DuPont Tyvek Silver 1m width x 50m roll (1 box / 2 rolls) For new construction, renovation, DIY, and professionals. * This is a heat-reflective sheet made by vapor-depositing aluminum on high-density polyethylene non-woven fabric and applying an anti-oxidation resin coating to each fiber to prevent aluminum degradation. * Although it is new and unopened, it is listed as "Like New" due to scratches on the outer box. No company name or other labels are present. If you wish to purchase, please comment and I will create a dedicated listing.