Specificaitons: Condition: Brand New Brand: ROCKBROS Capacity: S: 1L, L: 1.6L Size: about S: 21.5*5.5*8.5cm, L: 23.5*6.5*10.5cm Color:Black Material: 840D Nylon + TPU Waterproof fabric Weight: S: 90g L: 125gFeatures: 1. 840D nylon covered TPU waterproof film, fully waterproof fabric, high-frequency welding, laminating treatment, seamless splicing, effective waterproof 2. Quick-release installation, Velcro straps, easy to take, can be hand-held, double straps, more stable 3. The bicycle bag is supported by plates, keel support, hard shell prote