Waterproof WP Duffel Bag 100LExtremely durable 100L WP Duffel Bag. It is made from the toughest 840D TPU Coated Nylon, which can take almost any beating from sharp rocks, concrete piers and boat decks. High frequency welded seams are 100% waterproof and ensures that the seawater stays either in or out of the bag. The large drain valve helps to quickly drain the bag of any excess water. The extra wide lid gives a good overview and quick and easy access of your gear. The WP Duffel