This crawl space liner is American Made. It is a string reinforced polyethylene vapor barrier that is white on one side and black on the other. The DiamondBack™ naturally resists mold growth, does not off gas or have any VOC’s. Facts about this product- Roll size 13’4" x 75' – that’s 1000 Sq Ft on each roll It is a nominal 8 Mil product just like ALL the other 8 Mil liners on the market...