The Marina Bag from Puddle Jump Bags features a Puddle Proof base. Our no seam construction makes the base of this bag 100% waterproof. Put your bag in up to 4″ of water and it will not leak. But if you are going to have a puddle proof bag your bag needs to stand up by itself. That is why we glue what we call “skis” to the base that give it enough structure to support itself even when empty. The skis also act as chafe protection at the corners. Why glue? Stitching would add tiny holes. No holes = no possibility of leaking. The perfect bag for your shore landings in a dinghy. #madeincanadaonvancouverisland