Yaktrax Pro Traction Devices for Boots and Shoes give you the traction to safely negotiate slippery winter surfaces. Unique Skidlock coil system uses the weight of your footfall to insinuate hundreds of tiny grips into the snow and ice, giving you the same natural stability and multidirectional support you enjoy on dry ground. Spikeless, ultralight design works with any footwear; easy on/off with removable performance strap.Imported. Gives you traction on slippery winter surfaces Provides natural stability and multidirectional support Spikeless ultralight design Easy on/off Removable performance strap SHOE SIZES Size Men's Ladies' S 5-8.5 6.5-10 M 9-11 10.5-12.5 L 11.5-13.5 13