AquaLung Pro HD Weight Integrated BCD SureLock II Mechanical Weight Release System (patented) ? provides a safe, singlepull release. With SureLock, your weights are secure in the BC. Once engaged, the only way to release the weight is to pull on the handle. A proprietary backpack has a built in carrying handle and a traction pad to reduce tank slippage. Technologically advanced ResisteK? material resists fading and abrasion. The large, utility pockets found on either side of the Pro HD have two-way zippers with zipper pulls. There is an attachment loop inside the left pocket. The waistband is adjustable in the back to accommodate a wide range of waist sizes. The low profile flat valves reduce drag when moving through the water. Fixed pockets on the tank band increase weight capacity and help provide proper trim in the water. Features 5 stainless steel D-rings for all of your accessories. Optional accessories include the Airsource, Squeeze-lock knife, reflector kit and retractor kit. **Pictured here with optional knife.**