BUFF Polar Multifunctional Neckwear has been engineered with a 4-Way, seamless, ULTRA STRETCH fabric construction, that features UPF 50 protection,95% recycled REPREVE Performance Microfiber, and PrimaLoft fleece.. . . . . 4-way stretch. PrimaLoft fleece. UPF 50 Sun protection. 95% recycled REPREVE Performance Microfiber. Multifunctional - 10+ ways to wear. Moisture-wicking, quick-drying, breathable. One-size-fits-most adults. Weight: 2.3 ounces. As an engaged partner of UNICEF, BUFF has committed to donating 2% of our global yearly profits to projects helping combat COVID-19. Learn more. Upper: 95% REPREVE Polyester made from recycled water bottles, 5% Elastane. Lower: PrimaLoft Fleece; 85% Recycled Polyester, 15% Polyester. Hand or machine wash.