UltraSource Medical Disposable Shoe Covers, Large, Blue (Pack of 300) 100% nonwoven polypropylene is great for protecting shoes from dust, dirt, and slippery floors Ideal for open house showings, medical proffessionals in a hospital, painters and more Provides excellent barrier against contamination and germs that get tracked in from shoes Elastic band gives the cover a snug fit around the ankle Sewn-in seam on bottom of shoes for added traction