Rigid bottom and top design. Allows storage of removable snow flap. Waterproof inner roll top. Shovel can be stored while assembled on top of the bag. 16 to 26 liter (4. 2 to 6. 9 US gallons, 976 to 1587 cu in) capacity. Can now be installed in the tunnel in positions 1 & 2 and 2 & 3. Lin Q Cargo Base Kit included (860201806).