Perfect for water sports and all activities, the OverBoard Waterproof Backpack keeps your gear safe from water, sand, dirt, and dust. With seamless high-frequency welded construction and a roll-top sealing system, this backpack is 100% waterproof and suitable for quick submersion, so you can take it on the water. Features: 100% waterproof backpack - Class 3: IP66 Floats safely if dropped in water Protects contents from dust, sand, dirt and water High Frequency welded construction Padded shoulder straps and lumbar support Ventilated back panel with air-flow design Comfortable and buoyant light-weight straps Ventilated straps with reflective patches Adjustable sternum strap Reflective front strip 3 x D-rings for multiple attachment options 1 x Large outer elasticated mesh side pocket Internal Velcro strip to attach Backpack Tidy Top carry handle Litres 20 30 45 Height (cm / in.) 24cm / 9.4" 46cm / 18.1" 49cm / 19.2" Width (cm / in.) 24cm / 9.4" 28cm / 11" 33cm / 12.9" Capacity (cu. in.) 1200 1800 2746 Weight (kg) 0.72 0.84 0.97