← Back to Tools🧵 UPF Tool
UPF Loss Estimator
See how your garment's UPF rating degrades over time as a function of number of washes and fabric type.
New (0)100 washes
Starting UPF
50+
After 25 Washes
46
UPF 40+ — Very Good
Protection Lost
8%
UPF Over Time
500
4910
4625
4350
4075
37100
Number of washes
💡 Note on this fabric
Nylon retains UPF excellently — the tight weave holds up through many washes.
🛡️ Tips to Preserve UPF
- → Wash in cold water — heat is the biggest UPF killer
- → Air dry in shade rather than tumble drying
- → Avoid fabric softeners — they clog moisture-wicking pores
- → Turn garments inside out to protect UV-blocking weave
- → Replace heavily washed outdoor garments every 2–3 seasons