The Yaktrax Walker Traction Cleats for Snow and Ice are the original ultralight, everyday use ice gripper. They slip on easily over shoes and boots for instant traction on packed snow and ice. The Yaktrax Walker allows you to move naturally on potentially dangerous terrain making these ice shoes perfect for everyday activities such as dog walking, shopping, walking to work or school, etc. They are great for the elderly and young alike and conveniently fit in your pocket, glove box or purse when not needed. SIZE CHART X-Small (Fits shoe size: Women 2.5 - 6 / Men 1 - 4.5) Small (Fits shoe size: Women 6.5 - 10 / Men 5 - 8.5) Medium (Fits shoe size: Women 10.5 - 12.5 / Men 9 - 11) Large (Fits shoe size: Women 13 - 15 / Men 11.5 - 13.5) How do they work? Just slip the Yaktrax Walker Ice Cleats on your shoe or boot by starting from the front and stretch them over the back heel and off you go. The patented SkidLock coil system grips the ice and gives you traction in every direction. The coils are made of a rust-proof, specially treated steel, yet have no damaging spikes like conventional ice cleats do.