Premium Material: The bag is made of 600D nylon with welded seams, and the outer PU (polyurethane) coating is waterproof and prevent the rain or water entering into the bag to make your items wet. Inner layer is made from TPU coating (thermoplastic polyurethane), completely waterproof. The bottom of the bag is made of double-layered 840D nylon for added strength. It also protects against any wear and tear 10L Capacity: With the capacity of about 10L, it can easily hold your essential items, such as wallet, water bottle, tripod, power bank, repair tool, water bag, etc. Applicable for daily commute needs, short trips, riding around Easy Installation: Comes with Installation accessories. It can be mounted on any type of fork, including threads and dampers Improve Safety: Designed with reflective brand logo, it can improve the visibility at the dark to warn other people, ensuring your safety Specification: Bag Size: 40*22cm Capacity: 10L Features: large capacity, waterproof, easy to carry, easy to clean, mount on both sides of the bike Material: 600D nylon + waterproof TPU inner layer