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UPF (ultraviolet protection factor) represents the ratio of sunburn-causing UV without and with the protection of the fabric, similar to SPF (sun protection factor) ratings for sunscreen. While standard summer fabrics have UPF ~6, sun protective clothing typically has UPF ~30, which means that only 1 out of ~30 units of UV will pass through (~3%).
No previous sun protective clothing had been reviewed as a medical device in the United States or Canada. [5] The SPF rating was tested by labs to be 50+, [ 6 ] [ 7 ] by journalists to be 97+, [ 8 ] and by the manufacturer to be 100+.
Sun protection refers to: Sunscreen; Sun protective clothing; Car window sun protection glazing This page was last edited on 15 April 2021, at 18:58 (UTC). Text is ...
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Blood levels of folate, a nutrient vital for fetal development, can be degraded by UV radiation, [57] raising concerns about sun exposure for pregnant women. [58] Lifespan and fertility can be adversely affected for individuals born during peaks of the 11-year solar cycle , possibly because of UV-related folate deficiency during gestation.
The sun protection factor (SPF rating, introduced in 1974) is a measure of the fraction of sunburn-producing UV rays that reach the skin. For example, "SPF 15" means that 1 ⁄ 15 of the burning radiation will reach the skin, assuming sunscreen is applied evenly at a thick dosage of 2 milligrams per square centimeter [ 65 ] (mg/cm 2 ).
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