the following specification discloses a buoyancy compensator bladder and method of manufacture therefor . the bladder has a plurality of gussets implaced therein in order to rigidify and maintain a pre - established general configuration to the bladder . a plurality of insets or pleats are implaced around the shoulder area to provide for a generally arcuate curvilinear conformation therearound . a nylon plastic coated material is used for the gussets having one side that can be bonded to the inner side of the bladder , while the other side is formed from a nylon having a higher melting temperature . the gussets that are made from the nylon coated material are folded and implaced within the bladder or cavity formed from a plurality of sheets , the combination of which is brought together and heatset by means of an rf heater , or other suitable heater . the gusset material is formed from a nylon fabric having a polyurethane coating thereon formed from a liquidous first coating with two sheets adhered thereto to form a thickened polyurethane coating over one surface thereof without completely penetrating through the interstices to the other side to the extent where it would melt and bind during the forming operation .