Features of the Sea to Summit 13L Big River Dry Bag Low profile grab handles easy to grab and carry Base lash loop for dry bag sling attachment (rated to15Kg loads) Tri-Coat base for greater abrasion resistence and point load strength Hypalon non-wicking roll-top closure 420D ripstop nylon shrugs off water and abrasion Multiple lash points provide secure mounting points Super-durable ripstop nylon with a white waterproof Thermoplastic Urethane (TPU) laminated to the inside.