Silca Mattone seat packs use the power of BOA to keep all your spares in a compact, rattle free pack. A high friction Hypalon strap with BOA Closure completes the package. Making more than 15x the power of Velcro , the BOA Closure uses a ratcheting mechanism that will not creep or loosen even under the most extreme vibration and impact. This ensures the Mattone will remain &';high and tight&'; under your saddle until you need to access it. no swinging, swaying, or rattling. 0.74L Capacity Internal dimensions 150mm x 90mm x 55mm Holds 3 tubes, 2 CO2, regulator, tire levers, and multitool BOA Closure System YKK Waterproof Zipper Hypalon strap for security Item Specifications Attachment Method Straps Color Black Defined Color Black Total Volume 45 Waterproof No Silca Mattone Pack Seat Bag UPC: 850005186793