The Proviz REFLECT360 waterproof helmet cover is made from 100% reflective material, it is fully waterproof, seam-sealed and lightweight Adjustable elastic edge easily fits a wide variety of helmet sizes and shapes Reflective material helps to ensure your position on the road is more easily seen at night Material appears grey during the day and reflectively shines a brilliant white at night Helmet Cover One Size Unisex Grey YesUPC/EAN/GTIN: 5030578154633