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  Breawarf breathable underlay membrane,  thermal laminated by high polymer material + polyolef in microporous underlay membrane + high polymer material, we create this technology in China which is advanced  all over  the  world.Polyolefin microporous underlay membrane has excellent breathability, as well as good duration. Polyolefin microporous underlay membrane has not only acid and alkali resistance, but also good extensibility which enable the fasresilience after tearing by nail so that  to improve the sealing performance.