Shoe Covers Durability:We Use Tough Plastic Cpe,Which Has Better Toughness and Durability and Has Excellent Load-Bearing Capacity,Which Means Its Durability Is Not Affected By Height and Weight,and Its Durability Is Stronger Than Ordinary Shoe Covers (Data from The Lab) .Disposable Shoe Covers Size & Elastic Cord:15.7"X5.9"(40X15Cm),One Size Fits Most,The Elastic Cord Of Shoe Cover Has Good Elasticity,Supports Multiple Stretches Within 15.7" Until The Shoe Is Accommodated. .Shoe Covers Diaposable Non Slip Waterproof:We Have Made Improvements In The Subtle Aspects Of Shoe Covers,Which Will Make Shoe Cover Work Better Than Ordinary Shoe Covers,Non Slip & Waterproof,I Believe That The Excellent Production Technology Will Bring You A Good Experience. .Suitable for Most Indoor & Outdoor:Useful for Carpet Cleaning,Wear It When There Are Guests Visiting,Good Quality and Good Toughness More Effectively Prevent Dirt,Dust,Liquid On Shoes from Contacting The Floor,It'S Right Choice for House Garden Carpet Indoors Booties,Travel, Etc.