The TREX 6300TC Tungsten Carbide Slip-On Ice Cleats are lightweight ice grips for boots and shoes that provide tenacious traction and extra stability on ice and snow. One-piece design offers grip to prevent slip and fall injuries on the ice. These ice grippers feature 8 rugged tungsten carbide cleats on the ball and heel of foot for extra-firm grip on slippery terrain. Tungsten Carbide is a very hard compound. It rates 9 on the Mohs scale for hardness, second only to a diamond. Because it is so hard, the spike can be thinner, providing better penetration and sharper grip. Available in multiple sizes and will fit over any style of boot or shoe for traction and stability during winter work or other winter outdoor activities. Tested to be flexible in temperatures down to -40 deg F (-40 deg C), the stretchable rubber material provides a secure fit and easy slip on/off wear. These snow cleats are lightweight and can be folded small enough to be stored in a pocket or pack when not being worn. Sizing - TREX Ice Traction should fit snugly on your boot or shoe. Stretchy, one-piece design means no tightening or adjustments needed. Use your shoe/boot size to determine the approximate size. Medium fits 5-8 US Mens. Large fits 8-11 US Mens. XL fits 11-15 US Mens.XXL fits 15-18 US Mens. These are the ideal winter walking ice cleats for ice or snow. They also work to reduce the risk of a slip and fall injury. Replacement Studs available (sold separately) for years of use. Common applications include construction, roofing, road work, landscaping and delivery service workers. Also great as hiking spikes, running spikes, ice-fishing cleats, or for shoveling the driveway or walking your dog.