Our entire line of Solar shirts has built-in, permanent SolarBloc® UPF 50+ sun protection and has earned the Skin Cancer Foundation’s Seal of Recommendation. UPF 50+ is the maximum sun-protection rating for fabric and provides maximum protection of your skin against harmful UV rays.
The Skin Cancer Foundation grants its Seal of Recommendation to products that meet the Foundation’s stringent and specific criteria for effective UV sun protection. To earn the Seal of Recommendation, we must provide scientific data showing that this product sufficiently and safely aids in the prevention of sun-induced damage to the skin. The data is reviewed by a committee of photobiologists - experts in the study of the interaction between ultraviolet radiation and the skin.
PS - its been said UPF can even increase after washing & drying!