Specifications:Name: Waterproof BackpackMaterial: PVC waterproof materialZipper: nylon rubber teeth + zinc alloy sliderCapacity: 10L, 20L, 30LWeight: about 0.5KG, 0.85KG, 1.2KGAccessories: double shoulder strap*4Size: According to the picture reference (manual measurement, 1cm error is normal)Purpose: chest bag, backpack, crossbody motorcycle bag, multi-function bagFunction: Choose different sizes and different functions according to the size, you can combine to buy and use the effect moreWide Applications: Great for all outdoor activities, including motorcycle riders, boating, rafting, fishing, camping and hiking.Large Capacity: The bag is large capacity, and it features 4 ring or band, which can be tied to the bicycle racks, or on the aluminum alloy box of motorcycle and so on.package:1*Backpack(It is recommended to buy in combination for better use effect)