UV Block the Burn with UPF 50 protective fabric features: More body coverage for greater sun protection. Tighter knit fabric for higher level of protection from the sun's harmful rays. Improved fit so over-stretched product does not decrease the UPF rating. Dries quickly. Short sleeve, loose fit swim shirt. Logo hit at left chest. Fabric: 100% Polyester Jersey. Our swim shirts are looser fitting than a rashguard. If you would like a tighter fitting swim shirt, size down.