Pull down the zipper of the outer cover of the OMS¦ BC and you will see 1000 denier Nylon fabric backed with 5 to 6 oz. of Thermoplastic Polyurethane (TPU). This thicker TPU coating helps prevent abrasion and increases puncture resistance. Most competitors use only 1/2 oz. or no urethane backing on their BC covers making them susceptible to punctures, abrasion and subsequentleaks. Housed inside the outer cover we use a puncture resistant bladder constructed from 200 denier Nylon fabric backed with .12 mmof TPU. Most of our competitors use only a thin plastic film bladder that is more susceptible to damage. There are other differencessuch as 100% quality assurance inspection for leaks, imperfections and defects before your OMS¦ BC is delivered. The 45 lb. lift non-retraction band BC's are made from the same superior materials as the banded BC's. They incorporate a pull dump located at the driver's side lower left and an inflator hose exiting the center of the BC, tank side, and provide quality without compromise.