Due North This industrial grade sole is made from an exclusive rubber compound that features unparalleled grip, maximum durability in ice/snow conditions and superior operator safety. 14 tungsten carbide Ice Diamond spikes that last longer and hold an ice piercing edge better than steel; Strategically placed, molded-in spikes maximize traction while virtually eliminating the chances of spikes coming out. Specially designed "snow" tread pattern ensures maximum slip resistance, while the textured "Diamond Knurling" inner lining grips and keeps the traction aids stable and in place; An integral retention strap ensures a secure fit in all conditions. Our traction aids are designed to be safe for ladder use as the spike patterns have been strategically placed at the heel and front of the sole, leaving the mid-sole area open for an easy climb and descend. Since 1984, Due North has launched a stream of innovative products ranging from Specialty Adhesives to Winter Traction Aids. Whether it's for the casual athlete, the demanding outdoor enthusiast or the progressive manufacturer, our products are designed to excel in a variety of elements for all-purpose and everyday use, and we take pride in our use of quality materials that deliver the best results. Due North is dedicated to continuing to bring innovative solutions and products to our customers and distributors worldwide.