Built for Ultimate Sun Protection - BUFF(R)? CoolNet UV(R) Multifunctional Neckwear 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. Can be worn 12 different ways - from cap to balaclava, neck gaiter to hair tie - for optimal performance and protection, personalized style, and a perfect fit.