Like tire chains for the feet, these easy-to-wear grips enable the wearer to stride confidently through snow and ice. In fact, these lightweight, easy-to-use snow grips offer such unhindered ease of movement and are so effective that the US National Bobsled Team used them when walking up the bobsled run to inspect the ice prior to racing. Designed to stretch over footwear ranging from winter boots to dress shoes to jogging shoes, these elasticated grips use a steel lock coil system with hundreds of edges that bite into snow and ice to provide traction and stability. Weighing under three ounces a pair, they are almost undetectable to the wearer. They fit easily into a pocket upon removal, and do not damage carpeting or most flooring materials. Not for use with high-heeled shoes or for walking on slippery, non-icy surfaces such as tile or marble. Black. Men's sizes S (5-8 1/2), M (9-11), L (11 1/2+) and Women's sizes S (6 1/2-10), M (10 1/2-12 1/2), L (13+).