This Over Board Bag features a waterproof dry bag with a backpack to create an easy to carry pack. Made out of PVC tarpaulin and high frequency welded seams. Equipped with a Fold seal system and has an IP66 waterproof rating. Very comfortable to wear with fully adjustable back and chest straps. It also has a ventilated back panel to help keep you cooler. Large side mesh pockets will store absolutely anything. 20L or 30L available in select colors.