Special polyester fabric with a blended appearance. The DRY-TECH inner band and rubber Velcro closure make the Whippy the perfect cap to wear every day during your activities. Elastic mesh back for a perfect fit and maximum comfort. It has 6 seams on the visor, 6 panels, a semi-curved visor and a Velcro strap closure with a rubber front. Removable label. Front 100% Polyester, back 97% Nylon and 3% Elastane.