The Aqua Lung PRO QD is a great option for any serious diver looking for a BCD. It comes with the SureLockTMII integrated weight system, 6 stainless steel D-rings and patented swivel buckle system, a new backpack, a convenient right side Octo-pocket, an instrument retractor pocket, and knife attachment points. All these innovations when combined with the new and improved look of the Aqua Lung PRO QD make this BCD a very attractive new product.