Yaktrax Walker, Large, Women Size 13-15 & Men Size 11.5-13.5, Black, Walking Shoe, Made With Thermal Plastic Rubber, Injection Molded, 1.2 Millimeter Steel Coil With Steel Cromate Coating, Spikeless/Ultra Light, Easy To Get On & Off & Works On Any Type Of Footwear, 10 Times The Gripping Points As Any Spike Based Traction Device, Designed For Every Type Of Consumer Families, Elderly & Over All General Use.