Train all year with the same stability and traction of dry surfaces with the Yaktrax Run. Anatomically designed for use with running shoes. Removable spikes and steel coils, providing 360 degrees of unbeatable traction. Can be worn in temperatures as low as -41 degreesF. High strength natural rubber construction. 1.4mm steel coils with carbide steel spikes. Reflective heel tab for added visibility in low-light conditions. Performance strap for added safety. Anatomic fit with left and right design. Imported. Measurements: Weight: 5 oz Product measurements were taken using size LG (US Mens 11.5-13.5, US Womens 13-15). Please note that measurements may vary by size.