Flex-Wear is an extremely comfortable material that flexes and stretches with your movements. Best of all, it is very thin and lightweight, providing you with warmth without weighing you down. The skull cap that flexes with you while you work. Flex-Wear is thin, lightweight and flexible, providing you warmth without slowing you down. Made of comfortable, lightweight, flexible material, the Flex-Wear Unisex Skull Cap has a brushed inner lining that keeps your head warm and comfortable. Stretch fabric means easy on-off and less bulk - easy to store in your pocket. Plus, it comes in multiple colors, including HiVis lime for increased visibility in low light environments. 92% Polyester / 8% Spandex 4-Way stretch design with brushed inner liner Fits snug and comfortable to head