Feature 1REFLECTIVE STRIP: Bike hydration backpack is designed with night reflective strip, safer for night travel. Survival whistle, more beautiful and practical. 2WATER BAG ATTACHMENT STRAP: Bike backpack can store small items and repair tools for daily use. Designed with a water bag fixed belt, can be affixed more convenient. 3D SHAPED HANGING BUCKLE: Cycling backpack with D shaped buckle, can suspend small items. Interior design with zipper concealed pocket, increasing privacy. 4BREATHABLE DESIGN: The back of the shoulder straps are made of breathable fabric, no pressure on the back, breathable sponge. 5FIXED ELASTIC BAND: Mountain biking backpack uses fixed elastic straps on both sides to reinforce protection and make it more compact when riding.Item Type: Bike BackpackMaterial: Nylon .wang-edit-text{font-family:'Arial' important; } .wang-edit-text .wang-edit-text .wang-edit-text Package List1 x BikeBackpack