What is the difference between SPF and UPF?

SPF (Sun Protection Factor) is a rating used for sunscreens, while UPF (Ultraviolet Protection Factor) is a rating used for clothing. But the most important difference is the ability to use these products effectively.

SPF sunscreens can be good protectors, but most often they are used incorrectly, decreasing their effectiveness significantly.

Conversely, UPF 30 clothing that follows industry standards will protect the wearer against 97% of UVR rays.