Heavy-duty No. 8 natural canvas. Bottom and 8" (203 mm) of lower sides are covered with moisture-resistant vinyl. Non-scratch studs on base protect against wear. Steel-frame mouth with hinge for rugged use. Harness-leather handles with two retaining straps and buckles. Retro-fit bags with shoulder strap kit (Cat. No. 5102S). Kit includes leather strap with pad and snap hooks- rings and fasteners for attaching rings to bags.