The Ultraviolet Protection Factor (or “UPF”) rating measures the UV protection provided by a fabric.
It is similar to the SPF rating system used for sunscreen products. This rating indicates how much
UV radiation a fabric allows to reach your skin.
Calypsa’s swimwear’s rating is UPF 50+, which is the highest possible rating. That means it only allows
1/50th of the UV radiation to pass through it — blocking 98% of harmful rays. However, the use of
sunscreen is still recommended, no clothing can completely block out UV rays.
UV radiation a fabric allows to reach your skin.
Note: there are several factors that may affect the level of UV protection. Most fabrics
lose some of their UV protection if the garment is stretched out or worn, or if it has
been washed repeatedly. Also, when the garment is damp or wet, the amount of
UV protection is typically reduced. Lighter colors also tend to lose more of their sun
protection when damp or wet than darker colors.
