Sea to Summit Ultra-Sil Pack Cover is an ultralight waterproof cover to always carry with you in a pocket during trekking, hiking and backpacking trips! Being made of 30D Nylon it is very light and will protect your backpack and everything inside from the rain! Different versions are available, based on the size of your backpack:   XXS XS S M L Liters 10-15 l 15-30 l 30-50 l 50-70 l 70-90 l Weight 43 g 57 g 85 g 113 g 130 g Sea to Summit Ultra-Sil Pack Cover backpack raincover