You can use it as an open or closed, helmet liner, headband, half face mask, neck gaiter or beanie scarf. Flat-lock seam construction lies smooth against the head and ensures a form-fitting comfort when worn alone or under a cycling helmet. Offers you complete protection for your face, neck, and prevent the icy wind from whistling past ears and covers well without limiting peripheral vision while you're playing outside. 12.6" L x 8.3" W