Tyvek combines all the best physical properties and characteristics of paper, film, and fabric - in one exceptional material. Tyvek is lightweight, flexible, smooth, opaque, and resistant to water, abrasion, and aging. It has a high strength-to-weight ratio and is pH 7 (neutral). It is made from 100% high-density polyethylene fibers which form an interesting pattern when dyed. Great for book art, lamp shades, luminaries, and screens.