ASTM Standard Rating Guide for Sun Protective Clothing
Standard for Sun Protective Clothing and Swimwear:
| UPF rating | Protection category | % UV radiation blocked |
|---|---|---|
| UPF 15–24 | Good | 93.3–95.9 |
| UPF 25–39 | Very good | 96.0–97.4 |
| UPF 40–50+ | Excellent | 97.5–98+ |
Standard for Sun Protective Clothing and Swimwear:
| UPF rating | Protection category | % UV radiation blocked |
|---|---|---|
| UPF 15–24 | Good | 93.3–95.9 |
| UPF 25–39 | Very good | 96.0–97.4 |
| UPF 40–50+ | Excellent | 97.5–98+ |