The OTSO headband is one of the most functional, practical and innovative on the market, combining unique and exclusive designs with the best technology. Perfect thermal regulation that keeps your head and forehead cool and sweat-free. The fabric is a fine blend of lycrasport and polyester, perfect combination for maximum ventilation and moisture transport from the inside out. Technical data: Mainly made in the European Union, 100% heat regulating, 100% breathable, sweat wicking, ventilated 85% polyester, 15% lycrasport. Washing recommendation: washable at 40°C, do not bleach, do not tumble dry.