Hollis HD-200 BCD Traditional 2" waist strap with Stainless buckle 2" Nylon waist strap with quick release buckle and 2" SS d-ring, New comfort molded backpad 35 lbs bladder S & M sizes / 45 lbs bladder L & XL sizes 1000 denier CorduraTM w/ PU lamination outer shell & 15mm urethane internal bladder Contoured, lightweight backpack w/back pad, lumbar support, and a rolled neoprene comfort neck