Disposable cleanroom shoe covers protect against contaminants, ESD (electrostatic discharge) buildup, water and other liquids. They are lightweight, flexible shoe covers manufactured to meet strict cleanroom standards. Disposable cleanroom shoe covers have nonskid, PVC (polyvinyl chloride) tracks on the shoe cover bottoms to increase traction and safety. They are typically made of polyethylene, polypropylene or Tyvek. Polyethylene offers good resistance to liquid, while polypropylene breathes well and resists chemicals. Tyvek provides excellent protection against particulates.