SEAC Scuba Diving BCD 3D, Black/Red Sizes available from XS to XXL. 3D bellows bag to increase thrust and comfort. Back plate free of the bag to minimise the ''sail effect''. Shoulder strap with self-positioning buckle to fit the body. Material outer bladder: PU coated 420 D Nylon Material inner bladder: PU coated 420 D Nylon Dump valves: 3 with pull command D-rings: 6-40 mm in stainless steel + 2-25 mm in stainless steel Dry weight (size L): 3900 g (complete with hose and weight pocket).