Non-slip sole:           Walk naturally on snowy, icy roads! This product is a unique footwear accessory designed to help users walk freely in ice, snow, mud, sand and wet places without fear of slipping. This product is designed for everyone, young and old, from ramblers to construction workers and so on. If you have a pair of non-slip soles, you can walk freely in ice, snow, mud, sand and wet places. The light and simple crampons are suitable for outdoor mountaineering and traversing, and also suitable for city use in snow and ice weather.At present, it has been exported to many countries, and is well received by users and customers, which provides a safety guarantee for going out and working in ling freezing weather. Especially suitable for outdoor work industry and transportation, railway operations, urban management and sanitation workers, power grid field operations, and communications industry field station staff. And suitable for the elderly friends winter morning exercise safety needs. How to install non-slip sole: 1) make sure there are anti-slip nails facing outwards. 2) hook the non-slip sole with the toe of the shoe. 3) tighten the non-slip sole backward and buckle it on the heel of your shoe. 4) check whether the anti-slip sole rubber is safe to cover the two sides of the shoe. Simple way: direct installation in the sole. Shoe covers material:Adopt the silicon rubber which is made by special processing of wear-resisting and stretch-resisting. The antiskid nail of sole ministry is to use manganese steel to make, wearability is very good. Size:Medium size 38-41 (M) product size; 17cm(unstretched)          Large size 42-44 (L) product size; 19cm(unstretched) Color:black