Phantom Aquatics Premium Waterproof Backpack Dry Bag Roll-top 100% waterproof backpack | Floats safely if dropped in water Protects contents from dust, sand, dirt and water Large outer elasticated mesh side pocket and a top carry handle | Large internal zip pocket Unique 'High Frequency' welded construction Two-way sealing system (top or side) | Padded shoulder straps and lumbar support Comfortable back panel with air-flow design | Elasticated front webbing | Adjustable sternum strap and waist belt Super reflective patches on the front of the bag and both shoulder straps