The XTR by Yaktrax provides you with extreme traction on snow and ice. A patent pending spike design enhances traction while preventing snow build up. It is designed for anyone who prefers to go off road during the winter months. Hike and run with confidence on all outdoor trails. The XTR is made with high strength carbon steel spikes and chains that will resist rust and abrasion. To ensure a secure fit we have designed a thermo elastic outerband that will adapt to all types of footwear. It can be worn in temperatures as low as -41 Fahrenheit.