Details: Brand: ROCKBROS Product name: multi-functional bicycle bag Material: Body: Polyester + TPU / Buckle: Nylon + PA Capacity: 13.5-18.0 l Net weight: approximately 1004 g Product features: Large 18L capacity, easy to store more cycling gear Adjustable buckle, compatible with more rear seats, quick and easy to install Dual use, built-in shoulder strap inside, zipper can be removed and turned into a backpack Seamless waterproof compression process, long-distance guarantee without rainwater penetration With a side-mounted helmet buckle, it saves more space when riding on the go.