Zan Headgear WBN200, Balaclava, Nylon, Olive Drab Constructed from durable stretch nylon fabric (97% Polyester, 3% Spandex) Provides a comfortable, low profile fit under a helmet or when wore alone These non-bulky Balaclavas ares machine washable and fold easily for storage One size fits most any late teen - adult sized heads Includes a Bike Shop Supply Certificate of Authenticity / Warranty