Table 2.

Standards for UPF ratings on fabric and covering

UPF rating	Protection category	% UV radiation blocked	% UV radiation transmission
15, 20	Good	93.3–95.9	6.7–4.2
25, 30, 35	Very good	96–97.4	4.1–2.6
40, 45, 50, 50+	Excellent	≥97.5	≤2.5

Abbreviations: UPF, UV-protection factor; UV, ultraviolet.