SanSoleil "SolStyle Cool" Fabric" performance jacket offers moisture wicking, quick dry and athletic stretch. And, most importantly, UPF 50 Protection. This jacket is perfect for wearing with a short sleeve top for added sun protection. (Notice the "ballerina" hand covers.) It's also a wonderful travel jacket. Solstyle Cool has the unique ability to keep one cool in the sun's direct rays and add warmth when in the shade or inside.