Watertight, crushproof, and dust proof Floats in salt water with 100 lbs (45.4 kg) load Open cell core with solid wall design - strong, light weight O-ring seal Automatic Pressure Equalization Valve Fold down handles Stainless steel hardware and padlock protectors Personalized nameplate service available Unconditional Lifetime Guarantee of Excellence Retractable extension handle 4 strong polyurethane wheels with stainless steel bearings This version does not include foam or divider