This is the ScubaPro S-Tek Donut Wing Scuba Diving BCD Features: 1000D Cordura outer shell and 500D Cordura inner bladder deliver industry leading abrasion resistance and feature ecofriendly and color fast Dope-Dyed Fabric Durable YKK zipper can stand up to years of use. Improved rounded profile reduces air trapping. Each wing features an elliptical EPDM corrugated inflator hose and SCUBAPRO&&';;s K-Style BPI. S-Tek Donut Wings offer BPW divers reliable buoyancy control regardless of their diving position. Their durable rounded profile allows for smooth, controlled air migration.