Special rubber compound stays strong and retains elasticity in subzero temperatures for maximum durability. 6 Ice Diamond™ Military Grade Tungsten Carbide spikes are integrated into a proprietary rubber tread design from improved traction. New and improved toe-box design enhances fit and function along with a 360° spike pattern that provides more push and lateral grip. Unique support hole on heel strap provides easy adjustments and makes it easy to put on and take off. Spike patterns have been strategically placed at the heel and front of the sole, leaving the mid-sole area open for safe ladder use no need to remove our traction aids when climbing or descending ladders (mid-soles models excluded). Improved toe-box design enhances fit and function. 360° spike pattern provides more push and lateral grip.