Like the J111R, the S111R is a unique product that combines the performance features of semi-back inflation with the comfort of a adjustable BCD. A fully weight integrated BCD, the J111R incorporates a self-expanding gusseted bladder that offers increased buoyancy around the tank, allowing for proper buoyancy control while swimming. Cressi-sub’s unique C-Trim Weight System is utilized allowing for proper weight distribution along with easy weight ejection. Bladder material: 500 denier cordura Colorlock – 420 denier nylon | Large volume contoured bladder with self-adjusting Marine Balance System |New backpack | Large accessory pockets | New large capacity C-Trim Weight System.