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. Made of comfortable, lightweight, flexible material, the Flex-Wear Gaiter is a great pair to any hat or hood, and is long enough to provide coverage from ears to neck. Stretch fabric means easy on-off and less bulk - easy to store in your pocket.