Available as a pair, the 20lb capacity Rear Weight System is found on most of Zeagle's Heavy Duty BCs and can be added to any Zeagle BC that does not come with them. Mounting at the bottom tank band the pockets are dumpable from the bottom and loaded from the zippered top opening. Each pocket holds up to 10lbs of weight. * Can be mounted on the top tank band for trimming adjustment--- dumping in this location may not be possible*