O'Neill 2mm Sports Neoprene Cap The O'Neill 2mm Sport Cap is perfect for keeping the brain freeze at bay. The Wind Resistant Smooth Outer Skin reduces wind chill and the visor block out the sun and channels water away from your eyes, keeping your face clear so you can see better. The cap also keeps the sun's UV rays off your head so you don't have to worry about sunburn or sunstroke. FEATURES Wind Resistant Smooth Skin (SL) Exterior Flatlock Stitched Lightweight Fluid Foam SL Neoprene UV Protection Visor Blocks Sun and Channels Water from Eyes