SEAC Sherpa Buoyancy Compensator Padded backplate features an extended lumbar support to transfer tank weight onto hips, relieving shoulder stress Integrated Releasable Weight System 3D air cell with wings that wrap around the air tank cylinder to improve weight distribution The quick adjusting weight system ensures a quick release to keep you safe AHS frame to back harness system, SCS inflator, sternum adjustment, Advanced padded backpack frame, 6 stainless steel D rings