Built for Ultimate Sun Protection - BUFF? CoolNet UV+? Multifunctional Headwear is 95% recycled - engineered with REPREVE? performance microfiber, HeiQ cooling technology, Polygiene? odor control and has a 4-Way, seamless, ULTRA STRETCH fabric construction that features UPF 50+ sun protection. BUFF? CoolNet UV+? Multifunctional Headwear is approved and recommended by The Skin Cancer Foundation. Can be worn 12 different ways - from cap to balaclava, neck gaiter to hair tie.