Pont One Size Fits All Gray 5 5.4 mil Tyvek Disposable Skid Resistant Shoe Cover With Elastic Top (200 Per Case) - Tyvek FC skid-resistant shoe covers, low elastic top, 5 high (intended to be worn over your own shoes). Tyvek spunbonded olefin is a unique, nonwoven material. Resistant to penetration, it is chemically and biologically inert, low linting and static free until laundered.