Eberlestock Big Top Pack The Big Top pack is designed for the serious backpack hunter with a total of 7400 cubic inches of capacity and Eberlestock's aluminum stay frame system it is a pack you can live out of. For extra capacity you can remove the harness and hipbelt, and add the Big Top to the F1 Mainframe using the 3 side compression straps and compress duffel bags or meat in between the frame and the pack Part of the 7400 c.i. capacity is an expandable roll top entrance that can be rolled down to reduce the capacity. This pack is also designed to be able to carry a rifle butt down on the side of the pack. Material: Kevalar woven aramid waterproof fabric / water resistant construction Color: Military Green