Increases winter traction Ice Diamond? carbide tungsten spikes, with nail head design, are molded into Dura? plastic for longer wear and durability. Fits all types of footwear. Special compound and form fitting design retains elasticity and fit in all temperatures. Wider and thicker heel strap gives better grip, durability and longer wear. Bidirectional tread provides more traction. Diamond pattern provides more push off and lateral grip. Quick Fit? support rings and holes provide easy adjustment and easy on/off. Lightweight and compact - fits in a pocket. Wt. 7oz.