The red, 15L OverBoard Waterproof Dry Flat Bag is a lightweight, compact bag that protects your gear from water, sand, and dirt. It is made of special-edition ripstop nylon TPU (thermoplastic polyurethane) coated "super-light" material. The bag uses a Fold Seal System and high frequency welded seams, ensuring that, however, wet the surroundings, your valuables will stay bone-dry. Suitable for quick submersion, the bag also floats safely if dropped in water. It is carried by a handle or a removable, fully adjustable shoulder strap. The pack will hold 15 liters (4.0 gallons) worth of gear.