The LX2 replaces the older LX pocket and is a great evolution that adds weight versatility with an easy-to-use design. LX2 uses a simple pinch and pull buckle, and a large nylon handle on the pouch to ditch or carry the weights. 

The pouch itself is zippered and holds 12 pounds total, but is partitioned to isolate weights within the pouch. The benefit here is if you only have say 5lbs in the pocket, the partition will avoid it shifting around during the dive. This system is also reverse compatible to allow use with older Hollis backplates and harnesses.

The LX2 system ships as a pair with two pockets and two internal pouches.