The J2SD Spike Camp Duffel integrates perfectly with the Eberlestock Mainframe Pack, the Carrier Frame Pack, and the J-type packs. At only 12 ounces this 2,400 cubic inch duffel is a great addition to our EMOD packs and accessories. This duffel can also be paired with the J51, J34, J107, J117, and J79. Depending on the pack, you can carry it internally, or attach it to the outside to increase the capacity of your pack. The Spike Camp Duffel can be paired with other EMOD packs and accessories like the Batwing Pouches. The is a great lightweight option for backcountry hunters.