You never know exactly what???s around the river bend! The Delta provides loads of dry packing space so you can make the most out of every excursion. 18 oz. vinyl; RF welded seams; 3-roll top closure; Over-the-top and side compression straps; Grab handle and 20 oz. vinyl abrasion resistant base; Quick-access exterior zippered pocket with convenient lash points; Ergonomic padded back panel and shoulder straps; Adjustable sternum strap, hip belt and load adjusters.