Icer's Anti-Skid Detachable Safety Soles are astonishing. They can be used by everyone, including postal carriers, , walkers, joggers, paper carriers, delivery persons, hunters, campers, emergency personnel, seniors, and the list goes on. Ideal for outdoor activities of all kinds. Icer's feature a unique design that insulates feet from the ground keeping them warmer and dryer, yet provide extraordinary grip. Using quality light weight materials that stay flexible, they have replaceable cleats to assure a long lifetime. And they are made in Canada. Actual dimensions are used for size to select the proper size, as the sole sizes of winter footwear vary widely. The safety sole should be max 1,5 cm longer than the shoes sole and no more than 0,5 cm shorter than the shoes sole.