DuPont Tyvek Sheet Silver 1m x 8m Made by DuPont, USA DuPont Tyvek Silver Breathable Waterproof Heat Reflective Sheet (New, Unused) Compared to regular Tyvek, it has higher breathability, waterproof, and heat reflective performance. Sold by the meter. It will be folded and shipped directly in an A4 envelope. Since it will be shipped folded, there will be wrinkles and creases. Price reduction is not possible. Thank you. Shipped via Yu-Yu Mercari delivery service.