Protect your helmet and show your colors! One Size fits most English and Western Riding Helmets, including Troxel, GPA, IRH, International and more. The Visor Pocket fits over helmets with a built in brim. Solid Color Stretch Nylon Lycra-Spandex. Machine washable. No dryer, no heat. This is a cover that fits over your riding helmet. Made from stretchy nylon lycra, it fits most helmets with the built in visor.