The Atmos is a durably-constructed, full-featured hybrid air-cell BC. Unique, hybrid rear-inflation bladder enables air to shift, which provides maximum amount of lift and keeps you properly orientated on or below the surface.20 lbs (9 kg) of integrated weight in the Pinch & Release system and 10 lbs (4.5 kg) trim 20 lbs (9 kg) of integrated weight in the Pinch & Release system and 10 lbs (4.5 kg) trim Padded backplate features an extended lumbar support to transfer tank weight onto hips, relieving shoulder stress Three (3) over pressure relief valves optimize buoyancy control Crucial areas constructed of 1000D denier Cordura fabric 2 large, zippered pockets with knife mounting grommets Adjustable depth-compensating cummerbund Lift capacity: SM 30 lbs (130 N); MD 35 lbs (155 N); LG 45 lbs (200 N); XL 55 lbs (240 N)