DuPont Tyvek Silver, made by DuPont, USA Breathable, waterproof, and heat-reflective sheet (new, unused) Compared to regular Tyvek, it has higher breathability, waterproofness, and heat reflection performance. Sold by the cut. Will be folded and shipped directly in an A4 envelope. Since it will be shipped folded, there will be wrinkles and creases. No price reduction is possible. Thank you. Non-woven fabric Material Filter Tyvek sheet Tyvek Waterproof sheet Siding underlayment Tent Ground sheet Outdoor Camping DIY Mountaineering Mountain Helinox Moss moss msr Hilleberg Nemo Coleman DOD Tenmak Snow Peak