These waterproof frame bags have been designed to accompany all cycling adventurers whether on road gravel mountain or touring bikes. Available in 3 sizes the Z Adventure C2 C3 and C4 can be mounted on all bikes thanks to the removable and adjustable straps. The volumes are sufficient to carry a jacket in addition to a repair kit a phone a battery a pair of gloves... The size should be chosen according to your needs but also according to the space inside your frame. Universal Mounting:Fastening with removable and adjustable hook and loop straps Waterproof: IPX4 heat sealed construction and waterproof materials Wide opening: Easy access to the contents of the bag at all times Storage: Inside Zipped Pocket Light: Durable and lightweight material Specs Material: Polyester 600D TPU Dimensions L x W x H: 340 x 110 x 65mm Weight: 155g Mounting: Fastening with removable and adjustable hook and loop straps Capacity: 2.5L Zip: Water Repellent