Sun tees · Everyday & travel · US buying guide
Best short-sleeve UPF T-shirts
For a cotton-rich everyday tee, start with Coolibar Morada. For active travel, compare REI Sahara Shade. Prefer a looser women’s tee? Compare Solbari Sensitive with women’s Morada before choosing by fit and laundry routine.
SleeveShirts Editorial · · 18 min read
Specification-based research, not hands-on testing. How we evaluate
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Coverage comes first
UPF 50+ fabric still leaves bare arms.
A fabric rating applies where the shirt covers your skin. Plan for exposed forearms and the neckline, or choose long sleeves for more continuous arm coverage. All five tees publish UPF 50+ except Hanes O4820, which lists 40+.
Find your starting point
Quick picks, with the trade-off upfront
Coolibar Morada
Start here for a casual wardrobe and low tumble drying. Compare the actual hem length before choosing a size.
Cotton-rich crewSeparate men’s and women’s cutsSee fit, care & buying links →Solbari Sensitive
Compare with women’s Morada if you prefer its relaxed silhouette and have space and time to dry it in shade.
Line dry onlyLoose shape · viscose-rich blendSee fit, care & buying links →REI Sahara Shade
The more explicitly specified choice for wicking and daypack use. Check the current color and size availability.
Pack-oriented seamsPolyester/spandex · check stockSee fit, care & buying links →Hanes Cool DRI
Consider O4820 when you need two tees in one color. Check the delivered pack total and drying directions.
Two-shirt purchasePublished UPF 40+ · verify priceSee fit, care & buying links →No price in this guide is a live offer. The dated USD records below are purchase-planning references; prices and stock can change at any time. Check the selected seller before ordering.
Same questions for every shirt
Five tees compared by price, fit and care
We selected classic short-sleeve crews with a published model-specific UPF rating: two everyday Morada cuts, a looser women’s alternative, a synthetic travel tee and a budget multipack. Polos, woven button-ups, rashguards and hoodies have separate guides.
The comparison uses manufacturer specifications and editorial judgment. We have no matched cooling, drying-time, abrasion or odor tests for these five shirts. The two Morada cuts are one product family with different sizing, not two unrelated fabric technologies. This is a focused shortlist, not an exhaustive market survey.
On small screens, scroll each table sideways. Product names link to the detailed buying cards.
| Exact model | Recorded October 19, 2026 (USD) | UPF | Fabric | Cut & sizes |
|---|---|---|---|---|
| Morada Men’s 01590 | $491 shirtRecorded US maker price for Navy; not a current offer | 50+ | 52% cotton / 43% viscose from bamboo / 5% elastane | Relaxed; extended short sleeves; 29-inch body in LargeS to XXL; M-Tall also listed, unavailable in checked Navy selection |
| Morada Women’s 10437 | $491 shirtRecorded US maker price for White; not a current offer | 50+ | 52% cotton / 43% viscose from bamboo / 5% elastane | Relaxed feminine cut; extended short sleeves; 26-inch body in MediumXS to XXL; XXS also appears in the model selector, with color-dependent availability |
| Solbari Relaxed Fit Sensitive Collection | $891 shirtRecorded US maker price for Black before basket promotions; not a current offer | 50+ | 51% viscose from bamboo / 40% cotton / 9% elastane | Relaxed silhouette; round neck; four-way stretchXS to XXL; no separate Tall choice found |
| REI Sahara Shade C01708 | $39.951 shirtRecorded REI US price; checked Stratus Gray Heather selection sold out; not a current offer | 50+ | 91% polyester / 9% spandex | Regular; forward shoulder seams; flatlock constructionS to XXXL displayed; M-Tall through XXL-Tall also displayed, with sold-out selections |
| Hanes Cool DRI 2-Pack O4820 | Check seller2 shirts in one colorCurrent price not verified; check the exact O4820 two-pack with the seller | 40+ | 100% polyester interlock | Contemporary; crew neckS to 3XL displayed; no separate Tall length verified |
| Model | Weight disclosure | Wash & dry | Odor approach |
|---|---|---|---|
| Morada Men’s | 180 gsm for the linked ZnO Lightweight fabric; not garment weight | Machine wash cold, gentle; no bleach; tumble dry low; remove promptly; cool iron if needed | No named odor-control treatment on checked page |
| Morada Women’s | 180 gsm for the linked ZnO Lightweight fabric; not garment weight | Machine wash cold, gentle; no bleach; tumble dry low; remove promptly; cool iron if needed | No named odor-control treatment on checked page |
| Solbari Relaxed Fit | Fabric gsm and comparable body length not published on checked page | Machine wash warm; line dry in shade; warm iron; do not tumble dry | Maker claims anti-odor properties; no comparable wear-duration results supplied |
| REI Sahara Shade | 5.6 oz whole-shirt weight; fabric gsm not stated | Machine wash warm; do not bleach; tumble dry low | No named odor-control treatment on checked page |
| Hanes Cool DRI 2-Pack | Fabric gsm not stated | Machine wash cold; full drying directions not shown in retrieved specification; follow the delivered label | FreshIQ odor-protection claim; no comparative wear-life evidence |
Gsm measures fabric mass per area; ounces here describe the whole REI shirt. They are not comparable measures of warmth, drying or quality. Follow the delivered care label if it differs from a web page.
Two decisions to make before buying
Coverage and laundry, at a glance
Where will the fabric end?
A tee alone leaves the lower arm uncovered. Separate rated arm sleeves add coverage only where they stay in place; check the overlap when reaching. A long-sleeve shirt removes that separate sleeve junction, while hands and the neckline still need attention.
For that choice, compare sun-protection arm sleeves and our sun hoodie versus arm sleeves guide. Longer Morada short sleeves are still short sleeves.
What fits your daily routine?
Compare cotton-rich blends if you want an everyday knit feel. For active days, look for the exact shirt’s wicking and drying specifications. Then check the wash and dry label: a shirt that requires line drying may be inconvenient on a trip with one shared dryer.
The performance fabric guide explains why wicking, drying and odor control describe different things. None promises invisible sweat patches or a fresh shirt after several days.
Model-by-model buying notes
Which of these five shirts fits your trip?
Manufacturer links lead to the exact model. Amazon-supplied photos identify the pictured variant; the Solbari and REI cards use labeled illustrative category examples. Amazon buttons open searches that may include other sleeve lengths or pack quantities. Match the listing before buying.
Coolibar Morada Everyday Short Sleeve (Men’s)
Style: 01590
Recorded US maker price for Navy; not a current offer. Prices may change at any time; check today’s selected offer.
Choose it for errands, sightseeing and an ordinary T-shirt look when a relaxed cut suits you.
Amazon search, not a verified exact offer. Match the style, sleeve length, pack quantity, size, seller and return terms before ordering.
Start here if you want a plain crew for everyday wear. Compare the published 29-inch Large body length with a shirt you own, especially if shorter tees ride up on you. The cotton-rich ZnO blend and relaxed cut make this our men’s casual starting point. Extended short sleeves cover more of the upper arm while leaving the forearm bare.
Construction: 52% cotton / 43% viscose from bamboo / 5% elastane. Relaxed; extended short sleeves; 29-inch body in Large.
What you gain over a regular casual tee
The reason to shortlist Morada is a published UPF 50+ rating in a conventional cotton-rich crew, plus an actual body-length reference. That makes it easier to compare with an everyday shirt you already like. The label supplies a protection claim an unrated casual tee may not document; it does not establish that Morada will feel softer or last longer than your existing wardrobe.
Where REI is the more useful comparison
For a day centered on a backpack and sustained walking, compare Sahara Shade’s forward shoulder seams and explicit wicking specification. Morada’s published brief is casual use. The shared 50+ label does not establish equal sweat management. On a city trip with frequent indoor stops, the everyday cut may be the feature you care about most.
Check length before using the Tall selector
The 29-inch body measurement applies to Large, not every size or the M-Tall version. Measure a tee you own by the same method and compare the intended size. If it is torso length you need, an unavailable Tall option does not solve the problem; do not compensate by ordering an excessively wide regular fit.
Why consider it: A documented cotton-rich blend, longer short sleeves and a usable body-length reference.
What you accept: No forearm or raised-neck coverage. The Navy M-Tall selection was unavailable, so a Tall label in the selector is not a stock guarantee.
Coolibar Morada Everyday Short Sleeve (Women’s)
Style: 10437
Recorded US maker price for White; not a current offer. Prices may change at any time; check today’s selected offer.
Choose it if you want a women’s everyday crew and low tumble drying fits your routine.
Amazon search, not a verified exact offer. Match the style, sleeve length, pack quantity, size, seller and return terms before ordering.
The women’s Morada has a different cut and length from the men’s style. Check its 26-inch Medium reference if you dislike cropped tees or plan to wear a backpack hip belt. That measurement gives you a starting point for sizing; the men’s Large reference cannot tell you how this cut will fit.
Construction: 52% cotton / 43% viscose from bamboo / 5% elastane. Relaxed feminine cut; extended short sleeves; 26-inch body in Medium.
The practical advantage over Solbari
Low tumble drying is the clearest documented reason to choose this Morada over Solbari’s Sensitive tee. If your accommodation has a shared dryer, that difference affects how you rotate shirts between stops. The Morada still calls for a cold, gentle wash, so it cannot automatically join a hot mixed laundry load.
Decide by silhouette and hem position
Coolibar describes a relaxed feminine cut; Solbari describes a loose, relaxed silhouette. Those are maker descriptions, not equivalent garment measurements. Compare the Morada’s 26-inch Medium reference with a favorite tee, then check the chest and hip measurements for your intended size. If you need more room at the hem, compare the actual shape rather than buying a larger size only for length.
White requires a separate appearance check
The White reference documents a UPF rating, not how visible a bra, undershirt or damp patch will be. Try it with your intended underlayers in normal daylight while it remains clean and returnable. Adding an undershirt may change the look and feel of the outfit; include that layer when deciding whether this is your everyday tee.
Why consider it: Cotton-rich fabric and extended short sleeves in a separate women’s silhouette.
What you accept: Forearms remain bare, and the body length may not suit every torso. Check White over your usual underlayers; we have no opacity test for this color.
Solbari Relaxed Fit Short Sleeve T Shirt (Women’s)
Style: Sensitive Collection
Recorded US maker price for Black before basket promotions; not a current offer. Prices may change at any time; check today’s selected offer.
Choose it when its loose shape suits you, the current price works for your budget and you can line dry.
Direct-store link. We do not imply that this model is sold on Amazon.
Solbari is worth comparing if you want a loose silhouette and its viscose-rich stretch blend. Its recorded maker price was higher than Morada’s; compare the current selected prices before deciding whether the fit justifies the difference. You will also need space and time to line dry it.
Construction: 51% viscose from bamboo / 40% cotton / 9% elastane. Relaxed silhouette; round neck; four-way stretch.
What would justify paying more?
Compare this with women’s Morada when you want a loose round-neck silhouette and the Sensitive blend appeals to you. Both publish UPF 50+. If Solbari still costs more when you order, decide whether its shape works better for you and whether line drying fits the trip. The Sensitive name is not a promise of medical suitability.
Read the blend without overinterpreting it
Solbari lists 9% elastane versus Morada’s 5%. That is a composition difference, not proof of nearly twice the stretch, better recovery or a closer fit. Construction and garment measurements still matter. The viscose-from-bamboo label also identifies a processed fiber; it should not be read as a guarantee of the bamboo plant’s properties.
Plan a spare for moving-day laundry
Warm washing followed by line drying in shade is a real packing constraint. If you wash on the last evening before an early departure, you need another shirt available without assuming this one will be dry. A longer stay with a drying space is easier to plan around than changing hotels every morning. No exact overnight drying time was supplied.
Why consider it: A clearly specified stretch blend and relaxed cut, with an explicit line-dry instruction.
What you accept: Requires line drying and had a higher recorded maker price than Morada. No comparable drying-time evidence justifies an overnight-dry promise.
REI Co-op Sahara Shade T-Shirt (Men’s)
Style: C01708
Recorded REI US price; checked Stratus Gray Heather selection sold out; not a current offer. Prices may change at any time; check today’s selected offer.
Choose it for a daypack-centered trip if REI has your size and color available.
Direct-store link. We do not imply that this model is sold on Amazon.
Consider the Sahara Shade if you walk with a daypack. REI lists wicking and quick-drying features and moves the shoulder seams forward to reduce friction from straps. These are useful construction details for active travel; REI supplies no matched drying or cooling comparison with the other tees here. Match C01708, because older Sahara styles have different specifications.
Construction: 91% polyester / 9% spandex. Regular; forward shoulder seams; flatlock construction.
Why the seam details belong in the decision
Forward shoulder seams move a seam away from the usual top-of-shoulder position under pack straps. REI also lists flatlock construction and an underarm layout intended to reduce bulky seams in sweaty areas. Those are tangible design differences to check with your own pack; they are more informative than a general “outdoor” label, while offering no guarantee against rubbing.
A synthetic alternative to the casual blends
The 91% polyester and 9% spandex construction comes with explicit wicking and quick-drying claims. It is the more directly specified active-travel choice here when those features matter. Compare its regular fit with Morada rather than assuming a stretch fabric should be tight. There is no matched test showing how long either shirt takes to dry in your travel conditions.
The limits of its size and weight information
REI displays regular and Tall selections, but several were unavailable at the check. The listed 5.6 ounces describe a whole shirt, not fabric weight or a promise for every size. Do not compare that figure directly with Morada’s 180 gsm. If your size is unavailable, use the construction criteria to research an alternative instead of substituting an older Sahara listing.
Why consider it: Stretch, documented moisture-management claims and pack-oriented seam placement.
What you accept: The checked color was sold out. Treat this as a model to check directly at REI, not an immediately available Amazon recommendation.
Hanes Sport Cool DRI Performance T-Shirt (Men’s 2-Pack)
Style: O4820
Current price not verified; check the exact O4820 two-pack with the seller. Confirm the pack quantity and full delivered cost.
Choose it when you need both shirts and the current delivered pack cost works for your budget.
Amazon search, not a verified exact offer. Match the style, sleeve length, pack quantity, size, seller and return terms before ordering.
O4820 is the multipack option to price-check if you need two synthetic tees in the same color. Hanes specifies UPF 40+, moisture wicking and FreshIQ odor protection. Its current direct-store price could not be verified. Check the seller’s complete pack total before using it as your budget option.
Construction: 100% polyester interlock. Contemporary; crew neck.
When a multipack is useful
Two shirts in one color simplify a basic daily rotation if you expect to use both. If you only want one tee, your cash outlay is still the whole pack price. Compare the number of shirts you actually need and the full delivered total; a calculated unit price alone cannot establish that this is the better buy.
What you give up against Sahara Shade
Hanes lists UPF 40+ and a contemporary cut in 100% polyester; REI lists UPF 50+, a polyester/spandex blend and pack-oriented seam details. We found no comparable Hanes seam specification or verified Tall length. That makes REI the more documented option for a pack-centered requirement, while O4820 remains worth pricing for a simple two-shirt rotation.
Check the pack and the care label together
Match O4820, short sleeves and two units on the marketplace listing. A single shirt or a similar Cool DRI style is a different purchase. The retrieved specification supports cold washing but leaves full drying directions unresolved. Confirm those before relying on a hotel dryer, and treat FreshIQ as an odor-control claim without a verified number of odor-free days.
Why consider it: A same-color two-pack with a model-specific UPF claim and named odor-control technology.
What you accept: Requires a two-shirt purchase and has a lower published UPF rating than the other models. Current price and complete dryer directions need seller or garment-label confirmation.
If you are choosing between two
The comparisons that change the purchase
Women’s Morada or Solbari Sensitive?
Let laundry settle the first question. Morada permits low tumble drying; Solbari requires line drying in shade. For a trip with one dryer and limited spare clothing, Morada is easier to include in that routine. If you have drying space and specifically want Solbari’s loose silhouette, compare its garment measurements before paying more.
The blends do not establish a comfort winner. Morada is 52% cotton, 43% viscose from bamboo and 5% elastane; Solbari is 40% cotton, 51% viscose from bamboo and 9% elastane. Both list UPF 50+. These percentages identify what you buy, but cannot rank softness, cooling or stretch recovery. No matched test or complete comparable length measurement supports that ranking.
Morada fits a casual routine with low tumble drying; Solbari is worth comparing for its particular shape. If the measurements do not suit you, search a different cut before deciding by price or UPF alone.
REI Sahara Shade or Hanes O4820?
Start with the daypack requirement. REI documents forward shoulder seams, flatlock construction and an underarm layout intended to avoid bulky seams. Hanes’ retrieved specification describes a contemporary polyester tee without equivalent seam detail. For long periods under straps, REI gives you more concrete construction information to assess in a try-on.
Then check the purchase you actually need. REI is one shirt; O4820 is two in one color. Compare current delivered totals, not an old unit-price headline. REI’s UPF 50+ and Hanes’ 40+ are different published ratings, while both short-sleeve cuts leave bare forearms. If your requirement specifically says 50+, O4820 does not meet it.
REI is the more documented pack-oriented design; Hanes serves a basic two-shirt rotation. Confirm Hanes’ dryer instructions before making either part of the same laundry plan.
What the fabric label can tell you
Cotton-rich does not mean ordinary cotton
The Morada shirts are blends with a model-specific UPF claim. Their cotton percentage does not transfer that rating to another cotton tee. For sustained exertion, REI’s fabric guidance favors moisture-managing synthetics over cotton for moving sweat and drying. That general guidance explains why Sahara Shade is worth comparing for active travel; it does not provide a timed drying result for these exact blends.
“Bamboo” here means viscose from bamboo
The FTC distinguishes rayon or viscose made from bamboo from raw bamboo fiber. Read the actual label: these tees contain processed viscose in a blend. The plant name alone cannot establish antibacterial performance, environmental superiority or suitability for a skin condition. Solbari’s anti-odor claim remains a manufacturer claim; we found no matched wear-duration evidence.
For visible sweat, color and your underlayers need their own check. Wicking describes moisture movement; it cannot promise invisible damp marks. For a morning walk followed by dinner, a clean spare may solve the appearance problem more reliably than choosing by an unmeasured “fresh all day” promise.
Before removing the tags
A five-minute try-on and ordering checklist
Worked example: is that Medium long enough?
Suppose your favorite tee measures 27 inches by the same method used on the product page. The women’s Morada reference is 26 inches in Medium, so it would be one inch shorter on that measurement. That is a reason to check where your current hem falls, not an instruction to size up: a larger size also changes width. The men’s 29-inch Large reference belongs to another cut and size and cannot fill the missing measurement.
Before deciding, find the intended size’s chest, hip and body-length information. If the seller supplies body measurements rather than garment measurements, do not subtract them directly from a flat-laid shirt. Keep the return option intact while checking the result with your usual trousers and pack.
- Measure a tee you already like.Compare chest width and body length using the seller’s measurement method. A 29-inch Large and 26-inch Medium are different reference sizes, not a fair direct size comparison. Do not treat a broad brand chart as proof that every size exists in this style.
- Use your actual travel setup.Try the shirt with your usual underlayer and daypack, keeping it clean and tags attached. Check shoulder pressure, sleeve reach and the hem while sitting. A different seam location can be useful without guaranteeing freedom from chafing.
- Check the UPF on the exact listing.Match model number, sleeve length and pack size. Hanes O4820’s 40+ claim should not become 50+ in a marketplace description. If a seller does not document the claim, ask before relying on it; missing information does not mean zero protection.
- Calculate the delivered cost.Add the selected pack or single-shirt price, shipping and tax; subtract only a discount that actually applies. Divide by usable shirts for a unit comparison. If you need one shirt from a two-pack, budget for the whole pack rather than treating its nominal unit price as your outlay.
- Read seller-specific return terms.Check selected-item final-sale labels, return fees and the deadline. Do not wash or exercise in a shirt to “test” it unless that seller permits it. Manufacturer direct-store terms do not automatically transfer to an Amazon marketplace purchase.
- Finish the outfit.Look at forearms, hands, neckline and the back of the neck. Choose suitable added coverage and a hat, and plan shade breaks. A comfortable short-sleeve tee can be one useful part of an outfit without covering all exposed skin.
Returns and protection claims: keep them separate
Policies checked October 19, 2026: Coolibar’s general direct-store policy allowed 30-day returns for unworn items with original tags. Solbari’s US policy required returns within 30 days of delivery, unworn and unwashed with tags attached; it excluded final-sale items and listed a $10 return cost. Recheck the selected item’s current terms and fees before ordering; sale exclusions can override a general policy.
Read Solbari’s full US return conditions and the policy linked by your selected seller. No return policy here is presented as a free outdoor wear trial. A manufacturer’s UPF or wash-retention statement also does not promise unlimited replacements or extend a retailer’s return window.
Choose your tee by the compromise you prefer
- Choose Morada if everyday styling and a cotton-rich blend matter most. Pick the cut and measurements you need.
- Choose Solbari if you want its relaxed women’s silhouette enough to accept the higher reference price and line drying.
- Choose REI Sahara Shade if you want synthetic stretch and pack-oriented seams, and can find your size in stock.
- Choose Hanes O4820 if you need both shirts, the current delivered pack price suits your budget and UPF 40+ meets your requirement.
- Choose a long-sleeve sun shirt instead if arm coverage is the main problem you need to solve. A higher fabric rating cannot cover a bare forearm.
UPF fabric is only part of sun protection
The American Academy of Dermatology recommends covering as much skin as possible, seeking shade and using broad-spectrum, water-resistant SPF 30 or higher on exposed skin. Its clothing advice favors lightweight long sleeves and pants. If you choose a short-sleeve tee, account for the skin it leaves uncovered.
UPF measures ultraviolet transmission through fabric under test conditions. Garment condition, stretch and wetness can affect protection; use model-specific instructions rather than generalizing from a fiber name. A sun shirt is not a heat-safety guarantee. For a fuller outfit, use the sun-protection clothing guide, the hiker buying path and the UV index tracker.
Short-sleeve UPF T-shirt questions
What is the best short-sleeve sun shirt for everyday wear?
Start with the Coolibar Morada in the cut that suits you if you want a cotton-rich everyday crew. Solbari offers a relaxed women’s alternative with line-dry care. For an active trip, compare REI’s synthetic Sahara Shade if available. These are choices by documented fit, fabric and care, not a laboratory ranking.
Can a cotton T-shirt have UPF 50+?
Yes, a cotton-containing shirt can carry a model-specific UPF 50+ label. Both Morada styles here publish that rating for a cotton/viscose/elastane blend. This does not establish UPF 50+ for an ordinary cotton tee. Look for the exact garment’s rating; fiber percentages and a thick-looking fabric cannot substitute for it.
Do I need sunscreen with a UPF T-shirt?
A T-shirt leaves forearms, hands, face and parts of the neck exposed. The American Academy of Dermatology recommends shade, sun-protective clothing and broad-spectrum, water-resistant SPF 30 or higher on skin not covered by clothing. Follow the sunscreen label. A UPF fabric rating does not extend protection beyond the garment.
Are short sleeves cooler than long sleeves?
There is no universal winner. Fabric construction, looseness, wind, humidity, effort and direct sun all affect comfort. Short sleeves expose more skin; a loose long-sleeve layer may be more practical when you want continuous arm coverage. None of the product specifications establishes a safe time in heat or a measured body-temperature advantage.
Which shirts can go in a dryer?
The checked Coolibar ZnO care directions allow low tumble drying; REI also lists tumble dry low. Solbari’s Sensitive tee must line dry in shade. The retrieved Hanes specification recommends cold washing but does not supply complete drying instructions. Follow the label on the garment you receive, and keep incompatible items out of a shared laundry load.
Are these good swimming shirts?
This guide selects everyday and travel T-shirts. Do not assume a casual knit is designed for repeated chlorine, saltwater or wet-use protection simply because it has UPF. If swimming is your main activity, use our dedicated swim-shirt guides and confirm the exact model’s intended water use and care. Compare men’s swim shirts or women’s swim shirts.
Sources and price-check notes
Research date: October 19, 2026. Sources are public manufacturer specifications and the dated price records identified above. AI assisted research organization, drafting and the labeled illustrations. Coolibar records use its US storefront. Hanes’ directly requested page returned 403, so no Hanes dollar price is displayed. Recorded amounts are not automatically refreshed and may differ from what a seller charges now.
- Coolibar Morada Everyday Short Sleeve (Men’s), 01590: model-specific UPF, fabric, fit, care and the price reference stated in its buying card.
- Coolibar Morada Everyday Short Sleeve (Women’s), 10437: model-specific UPF, fabric, fit, care and the price reference stated in its buying card.
- Solbari Relaxed Fit Short Sleeve T Shirt (Women’s), Sensitive Collection: model-specific UPF, fabric, fit, care and the price reference stated in its buying card.
- REI Co-op Sahara Shade T-Shirt (Men’s), C01708: model-specific UPF, fabric, fit, care and the price reference stated in its buying card.
- Hanes Sport Cool DRI Performance T-Shirt (Men’s 2-Pack), O4820: model-specific UPF, fabric, fit, care and the price reference stated in its buying card.
- Coolibar fabric directory: ZnO Lightweight composition, 180 gsm description and care; cross-checked against the fabric block on each exact product page.
- Solbari US returns: deadline, condition requirements, final-sale exclusion and return cost.
- American Academy of Dermatology: sun-protective clothing: coverage, shade and sunscreen recommendations.
- REI Expert Advice: UPF clothing: rating interpretation and the effects of stretch, wear and wetness.
- REI Expert Advice: hiking clothes and fabrics: general moisture-management considerations; not a comparison test of the recommended tees.
- FTC: bamboo textiles: accurate identification of viscose/rayon made from bamboo; no automatic transfer of plant properties to the fiber.