Vertx Gamut Backpack Gen 3, Black, Outside Dimensions: 21H x 11.5W x 8D, CCW Compartment Dimensions: 18H x 11H x 2D, 25 Liters, Nylon 5017-IBK Comfortable" customizable and incognito" the Gamut is an everyday pack that's anything but ordinary. No matter the application" the Gamut is optimized to stow all the gear you need and then some.