Disposable shoe covers prevent the spread of contaminants. They come in disposable cleanroom and general purpose forms. Disposable cleanroom shoe covers reduce ESD (electrostatic discharge) buildup, keep cleanrooms sterile and protect workers from particulates and liquid splash. Disposable general purpose shoe covers protect against contaminants in different environments. They typically have nonskid bottoms made of PVC (polyvinyl chloride) to increase traction.