The medium Rain Cover from Mountainsmith is a strong, reliable and water-resistant way to keep your pack safe when you're out hiking, camping or climbing. The 190t Taffeta nylon fabric comes with a complete drawstring closure that encompasses the entire circumference of the cover. For added strength, the seams are all taped and the hook and loop closure is firm. The cover is machine washable in cold water (do not tumble dry). It comes with a handy stuff sack in which it can be stored when not in use.