The UV Buff® is made from Coolmax® Extreme fabric to block 95% of UV rays and wick sweat quickly away from your skin with its four-channel fiber. Ultimately designed to keep you comfortable and protected hour after hour on long, sun-filled adventures. Blocks up to 95% of UV rays yet the soft, breathable Coolmax® Extreme seamless fabric is comfortable and attractive.  Features Polygiene® active odor control with moisture wicking.