The ROCKBROS balaclava is perfect for all kinds of outdoor sports. PRODUCT FEATURES: -perfect for all kinds of activities: cycling, hiking, skiing, etc. -works great under a helmet -flexible -very light -flat seams -mesh panel for smooth breathing -holes for glasses on the sides -protection against UV radiation - quick-drying - wicks away moisture well -universal size -material: 88% nylon, 12% spandex