OverBoard Classic Waterproof Duffel Bag (40L, Black). Store and protect your gear with the black, 40L roll-top Classic Waterproof Duffel Bag from OverBoard. This duffel bag offers protection against water, dirt, and sand. For easy access the bag has a wide-mouth opening. Fully-featured, the bag has a large internal wet/dry pocket, an outer weatherproof zip pocket and interior mesh pockets. Carry the duffel with the adjustable shoulder strap or connectable, dual top straps. Welded seams and OverBoard's Fold Seal System with a touch-fastener strip work together to make this bag 100% waterproof and suitable for quick submersion. Internal PVC tarpaulin is bonded to an outer nylon, cotton shell to make the bag both strong and durable. And for safety and visibility, the bag has two reflective strips. Four D-rings offer a variety of attachment options.