Tyvek® garments are composed of flash spun high density polyethylene which creates a unique, nonwoven material available only from DuPont™. Tyvek® provides an ideal balance of protection, durability and comfort of any limited use fabric technology. Tyvek® fabric offers an inherent barrier to particles down to 1 micron in size. Protection is built into the fabric itself; there are no films or laminates to abrade or wear away. Tyvek® fabric's durability advantage over microporous film fabrics delivers consistently better barrier, even after wear and abrasion. Attached respirator-fit hood w/elastic around face opening. Longer zipper extends to chin for complete coverage of neck. Elastic opening for tighter fit at wrist and ankle. 25/case.