How we judge source quality
Not every source deserves the same weight. SleeveShirts separates standards-based claims, manufacturer data, independent review signals, buyer feedback, and editorial synthesis so readers can understand the strength of a recommendation.
Highest confidence
Published standards, medical or dermatology organizations, textile-testing standards, and manufacturer documentation that clearly states materials, UPF ratings, and care guidance.
Useful comparison signals
Independent gear reviews, outdoor publications, brand documentation, product specifications, size charts, and availability data.
Weak but practical signals
Amazon ratings, buyer feedback themes, Reddit threads, and community comments. These can reveal fit, durability, odor, and sizing patterns, but they are not proof by themselves.
What we avoid overstating
We avoid treating marketing claims, anonymous comments, affiliate listings, or AI summaries as direct evidence of product performance.