Engineered by DuPont scientists, DuPont Tyvek® coveralls are made of flash-spun, high-density polyethylene which creates a unique, nonwoven material. The protection is built into the fabric itself; it can?t be abraded or worn away. Our Tyvek® coveralls are engineered with our unique comfort-fit design to give wearers what they want a greater range of movement, improved mobility, a more tailored fit, and better overall comfort.