100% Waterproof with Fold Seal System (roll-top Velcro closing with clip fastening); If dropped in water, the bag floats safely; Two-way sealing system (side compression and traditional top); Front mesh pocket with zip fastening; Padded shoulder straps and lumbar support; Air-flow design with ventilated back panel; Buoyant and comfortable light-weight straps with ventilation system; Adjustable waist strap and sternum strap with emergency whistle buckle; Multiple attachment options with D-rings; Quick release elasticated webbing; Internal accessories pocket with zip fastening (H: 25cm x W: 21cm); 2 x large outer elasticated mesh pocket to side; Dimensions: 49.5cm x 34cm x 16.5cm; Capacity: 30 L; Weight: 1.32 kg; :: Unisex > Kayaking Size: one size.