Yaktrax Pro traction cleats are designed to give you better traction on packed snow or ice. Be it walking, jogging, or hiking, the Pro's low-profile gripping coil is designed to help your stability when you are out in slippery winter conditions. They are made out of heavy-duty natural rubber and 1.4mm steel coils. The Pros conform to any boot or shoe and are incredibly durable. Yaktrax recommends sizing up one size larger than our average shoe size for oversized boots or shoes.