ScubaPro Classic BCD w/ BPI This Item Includes: Scubapro Classic BCD with LP Hose and Owner's Manual Scubapro Classic BCD Stabilizing Jacket: BCD Style Choice of Experienced Divers Dynamic Control System: Internal Air Passages Embrace Diver & Air to Remain Dynamic Inside Jacket No Inner Bladder Air Flows Freely to Jacket's Highest Point Diver Rotates Around a Bubble Adds Stability & Creates Ease of Motio Stabilizing Jacket: Most Widely-Used BCD of All-Time