Name: backpack rain cover Color: cam, green, blue, red and so on. Size: Aliexpress choice : 20L True capacity : (15-25L) Weight: 33g Aliexpress choice : 30-40L True capacity : (30-40L) Weight: 45g Aliexpress choice : Other True capacity : (45-50L) Weight: 49g Aliexpress choice : 50-70L True capacity : (55-65L) Weight: 58g Material : nylon outside + waterproof PU inside Package: 1 backpack rain cover Super Waterproof: Don’t let a drop of water in.Waterproof wear-resisting Nylon material can make it. It can resist water of 2000mpa hydraulic pressure rate . Dual-layer Design. The exterior layer adopts wear-resistant Nylon to avoid scratching and dirt. The inner layer adopts waterproof coating to avoid rain and snow. Elastic fabric around: It will make the cover stick to the backpack to avoid falling off. Compact and Portable: It can be easily folded so that you can put it in the side bag of your backpack for storage. Easy to carry: Ideal for Outdoor Activities: Perfect for outdoor travel, riding, climbing, hiking and so on.