It doesn't reinvent the duffel bag. Instead, Arktype's Boltpack just makes it more useful thanks to a clever combination of materials and features. It's built from rainproof 1680D ballistic nylon, with a double-walled ripstop nylon interior and water-repellant zippers to protect contents from the elements. Inside, there are zippered pockets for organization, while an external waterproof zipper pocket and external sleeve keep essentials at the ready. The main handles and removable shoulder strap are made from 4000lb Mil-Spec webbing for durability, dual ventilated shoe/laundry compartments let wet items breathe, and the Mil-Spec ladder-stitched webbing on the end allows for easy attachment of other items.