1.[ EVA Hard Shell& ]This bike bag frame is made of durable EVA hard shell and waterproof fabric, which makes your bag both resistant to deformation and very waterproof, and this bike tool bag is equipped with a laminated waterproof zipper, which is tight but easy to unzip without worrying about snagging, and this zipper is also designed to be waterproof to prevent rainwater from seeping in. 2.[]This waterproof ebike bag has a large capacity of 3.2L, perfect for storing your essentials such as cell phone, keys, towel, mug, maps, etc. while riding in the mountains or on the road. 3.[ Bike Frame Bag]This bicycle frame bag is small and lightweight, very conducive to you to take it to any place you want to go, but also can be used as a handbag, shoulder bag, shoulder strap can be adjusted, can also be removed! 4.[Easy to Install ]This top tube bag comes with 2 velcro straps, 1 bottom elastic drawstring and 1 buckle strap on the left side, it's easy to stabilize the bike bag on handlebars, tripod. The velcro straps and elastic band can be adjusted to the right length according to your needs.