Available in 3 volumes, the Z Adventure C2, C3 and C4 can be mounted on all bikes using the removable and adjustable straps. The volumes are sufficient to carry a vest in addition to the repair kit, a phone, a battery, a pair of gloves... The size is to be chosen depending on your needs but also depending on the space inside your frame.Universal Mounting: Attachment using removable and adjustable self-gripping straps.Waterproof: IPX4, welded bag with waterproof materialWide opening: Better access to the content.Storage: Inside zipped pocket.Lightweight: Durable and light materialSpecs:Material: Polyester 600D TPUZip: Water repellant zipMounting: Universal Using Self Gripping StapsDimensions: 500 x 140 x 65 mmWeight: 238gCapacity: 4.2L