Size: Adult, One Size fits most. Also fits Juniors and Teens; Weight - 2.9 oz; Dimensions - 9.75" (W) x 18" (L) Built for performance: Made with our lightweight Comfort Shell Stria Performance fabric - 88% polyester, 12% spandex. It works to manage moisture and maintain heat, while also providing a snug fit and UPF 50+ sun protection. More than meets the eye: Pull the hinged face opening backwards to wear as a neck warmer or facemask, or back up as a full face balaclava. The inside front lining of 100% polyester micro fleece adds an extra layer of comfort and warmth from the elements. Easy to clean: Time for a wash? Just throw it in the wash on cold, tumble dry on low heat and it's ready for your next outing. Your New Favorite Liner: Perfectly designed to be worn under a helmet or a hat, whether you're hitting the slopes or riding your favorite trails. Whether you choose to use the single-layer Quantum as a facemask or neck warmer, this hinged hood keeps you warm and dry, while feeling soft against your skin.