Made for use with the J-series packs, and larger than the regular Spike Camp Duffel, the Super Spike increases your pack's capacity by a full 3500 cubic inches. This gives your J-type pack its maximum total volume of as much as 8300 cubic inches, depending on the pack model. It is made of the same NT1 fabric that our hunting packs are made of, so that when mounted externally you get both added capacity and greater camouflage coverage. The Super Spike also features external facing access, internal tuck-pockets, and a carry strap, making it useful not just in camp, but anytime you need a nice sized duffel bag. Just like the regular Spike Camp Duffel, the Super Spike can be carried either internally or externally on your J-series pack.