SKYRC 100% Polyester Double Dry High-performance Mesh Dew Rag Head Wrap, Helmet Line, Cooling Skull Cap for Riding / Skiing / Motorcycling / Trekking / Mountain climbing or Other Sport Activities 1. One size fits most 2. Constructed of lightweight, 100% Polyester, simple, practical, functional 3. High-performance mesh dew rag. Technical fabric transports moisture away, keep you dry 4. Comfortable to wear under any hats, head wrap, helmets or alone 5 .Elastic band for secure, perfect looking fit