Ballast system consists of 2 pockets, which are slipped on a waist strap and fastened to a backplate (pair of bolts and nuts included). Left pocket has a D-ring for mounting a pressure gauge. Inside each pocket is an inner pocket with a handle for inserting the weights. Especially suitable for slim people, and if you need to save some space on your waist strap. Each pocket can carry 2 pcs of standard sized 1,5-2 kg lead blocks.