Polyester,Mesh Tie closure Hand Wash Only Adjustable Tie closure Made with polyester, moisture management fabric, Mesh stays cool on head Mutifunctional doo rags are ideal to be worn as cycling/running skull bandana hats. Or as Breathable lightweight helmet liner, can be under helmets or hard hats for sweat wicking and losing heat by evaporation Lightweight, stretchy and breathable, drys quickly, perfectly absorbs sweat during sports activities; Both indoors and outdoors activities, like hiking, motorcycling, workout, cycling, running, tennis, dancing, basketball, skiing, fishing, kayaking, climbing, snowboarding, welding, cooking One size fit all; Suitable for Kids and Adults,Unisex for men and women; Machine wash or hand wash and hang to dry, no pilling, no fading Doo Rag Bicycle Skull Caps Helmet Liner Cooling Hat Cap Summer Sweat Wicking Beanie Cap Hat for Women & Men - B13RGIXED