UV Skinz sun protective clothes are stylish and carry a UPF rating of 50+, which blocks out over 98% of the sun's harmful rays, protecting delicate skin from damaging sunburns. Sunscreen isn't always enough and is often not used correctly. Some folks have skin allergies or sensitivities to chemicals that sunscreens can contain. UV Skinz are sun shirts that are not made with any chemicals or lotions. The fabrics we use for our sun protection clothing are rigorously tested and rated in accordance with AATCC183, ASTM26544, and ASTM6603, the highest standards for UV fabric testing. Wearing UV protective clothing, such as our fun, cool UV Skinz sun protective sun & swim shirts, is an important step in preventing sunburns, premature aging of the skin and skin cancer.