The Akona Tanami Sling Dry Backpack Bag is water resistant, durable, and easy to wipe clean. The 3-roll top opening makes it easy to fill with gear. Comfortable and durable, the Tanami is perfect to bring on a hike, to the beach or on the boat. The backpack bag has radio frequency (RF) welded seam construction to seal out water. 3-roll top and squeeze-style side-release buckle closure seals off the bags content from the elements sealing out water, dust, dirt. mud and debris. The Akona Tanami Sling Dry Backpack Bag has side mesh pockets with drawstring cord closure equipped with barrel lock fastener perfect for water bottles. Bungee cord with barrel lock fastener on rear for securing gear to bag exterior. Removable sling shoulder carry strap. This durably constructed PVC Backpack measures (L x H x W) 23" x 12" x 8" (58.4cm x 30.5cm x 20.3cm) with a volume of 2,208 cubic inches (36.2 liters). Dry bag is available in multiple colors.