This Overboard bag combines a waterproof dry bag with a backpack to create an easy to carry pack. Made out of PVC bonded nylon fabric, PVC tarpaulin, and high frequency welded seams. Equipped with a Fold Seal System?äó waterproof IP66. Very comfortable to wear with fully adjustable backpack and chest straps, ventilated back panel to help fight a hot back. With large side mesh pockets to store absolutely anything.