Made by DuPont, USA DuPont Tyvek Silver Breathable Waterproof Heat Reflective Sheet (New, Unused) Compared to regular Tyvek, it has higher breathability, waterproofness, and heat reflection performance. Sold by the cut. It 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 ALTRA Yamatomichi answer4 OMM MMA houdini teton bros Runboys! Run girls! Rawlow Mountain Works Rawlow Mountain Works Atelier Blue Bottle Locus Gear Ultra Heavy Tacoma Fuji ALTRA Salomon Hoka One One inov8 Valicans Halftrack Products Moonlight Gear Sora Titanium Gear Miki Kurota Mountaineering Mountain Helinox Moss moss msr Hilleberg NEMO Coleman DOD Tenmak Snow Peak