The tubes are connected via a series of patented one-way valves. If one chamber is punctured, the others remain inflated. Made from a coextrusion of low-density polyethylene film and nylon, ChamberPak also has superior air retention.Designed for a wide range of consumer electronics, refurbished components and more. Ships flat tp provide shipping and storage benefits compared to expanded polystyrene (EPS) or molded pulp components. (Twenty thousand ChamberPaks can fit on one skid vs. a couple hundred sets of EPS or several thousand molded pulp types.) This also helps reduce fuel consumption and carbon emissions.