The TREX 6315 Strap-On Heel Traction Cleat are ice grips for boots and shoes with rugged steel plates that turn boot heels into ice picks, leaving the mid-foot free for vehicle operation.Ice traction cleats help save money while preventing slip and fall injuries. These ice grips for boots provide the best in class all-direction traction on ice and snow during the winter months while leaving the toe and mid-foot free. Versatile traction cleat is available in multiple sizes and fits on the heel of any boot or shoe. Durable webbing with hook and loop strap provides a secure fit and stability for winter work or recreation. Material is lightweight and is small enough to be stored in a pocket or pack when not being worn. Rear reflective accents help make wearers more visible in dark environments. Sizing - TREX Ice Traction should fit snugly on your boot or shoe. Use your shoe/boot size to determine the approximate size. Medium/Large fits 5-11 US Mens. Large/XL fits 11-16 US Mens. The channel steel plate design will not retain ice, snow, or debris making the heel traction cleat versatile for hiking, running, construction, roofing, road work, ice fishing and for delivery service workers. The heel-only traction is ideal for driving vehicles or climbing ladders in cold conditions.