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, and there are no films or laminates to abrade or wear away. Tyvek® fabric's durability advantage over microporous film and SMS fabrics delivers consistently better barrier, even after wear and abrasion. Frock extends to knee. Frocks provide body-length jacket design with front snap closures for easy donning and doffing. Ideal for applications that do not require the full body coverage of a coverall. Laydown collar. Elastic opening for tighter fit at wrist.