Wear the balaclava on its own or under a helmet. Wear it as a full face mask, open balaclava, half ski mask or neck gaiter. Just don't wear it in an airport or bank! People use our balaclavas for skiing, snowboarding, riding, ATVing, hunting, construction, warehouse work and shoveling snow. Note this balaclava is constructed with heavyweight, thick fleece - if your helmet is super tight on your head, it may not fit with this balaclava. ONE SIZE FITS ALL