BUFF Original Multifunctional Neckwear - Castlerock Grey is engineered with a 4-Way, seamless, ULTRA STRETCH fabric construction that features UPF 50 protection, and 100% recycled REPREVE® Performance Microfiber. BUFF® Original Multifunctional Headwear is approved and recommended by The Skin Cancer Foundation. It can be worn more than twelve different ways, from a cap to a balaclava to a hair tie, for a personalized style and great fit.