Tyvek 400 Coverall, Serged Seam, Attached Hood, Elastic Waist, Elastic Wrists and Ankles, Front Zipper, Storm Flap, Wht, 7XL Composed of Tyvek 400 flash-spun, high-density polyethylene which creates a unique, nonwoven material Offers inherent barrier against particles down to 1.0 micron in size Protection built into the fabric itself, no