Yaktrax Walker - Yaktrax have a unique , spikeless, patented coil design, unlike other products on the market. Made with high strength, abrasion resistant 1.2mm steel coils and easy-to-use polyelastomer material, the Yaktrax Walker easily conforms to the shape of your boot or shoe. With its patented SkidLock coil design, the Yaktrax Walker provides 360 degrees of traction on packed snow and ice and can be worn in temperatures as low as -41 degrees Fahrenheit. Ultralight Easy On/Off Spikeless Small (Men's 5-8.5/Women's 6.5-10), Medium (Men's 9-11/Women's 10.5-12.5), Large (Men's 11.5-13.5/Women's 13-15) Style: 0800