The Sharper Image Ice Traction Slip-Ons Stretch-On Traction Footgear Ultra LIght, Highly-Elastic "Second Soles" Stretch Easily Over Most Shoes & Boots Built Tough in Cold Resistant Thermoplastic for Extra Strength & Durability. Ground Gripping Steel Studs Provide Traction on Ice and Snow. Fits Men's Sizes: 8 - 12. Fits Women's Sizes: 7 - 11.