O'Neill Men's Premium Skins UPF 50+ Short Sleeve Rash Guard, Lunar/BrightBlue/Black, Medium 6oz. Nylon/Spandex 4-Way Stretch Short Sleeve Crew - Quick Dry, 4-way stretch 50+ UV Protection Factor Performance Fit: Form fitting tight layer fits like a second skin Flatloc Stitched - To avoid skin irritation. Board short Connector