This is the Highland 37 Pound Wing BCD For Scuba Diving Features: 360Adeg full circle design allows quick left/right gas transfer 4 cam slots allow direct attachment to cylinder with nylon cam bands Built with internal loops for optional bungee retraction "Old School" tech inflator, center point attachment Elliptical corrugated hose to reduce drag 25" Miflex quick-disconnect hose (Carbon color) Three sets of 11" (280 mm) centered grommets Grommets made from heavy nickel-plated brass 22 mil thick urethane bladder Cover built from 1000d nylon cordura Right or left side OPV This 360Adeg full circle design wing is built-to-last with a 22-mil thick urethane inner bladder and a 1000D nylon Cordura with urethane lamination outer cover. The cover seams are sewn with #138 nylon bonded thread for strength and durability."