Optimal grip while running. When you run, you use the foot differently than walking, so we wanted to develop an ice grip that was suited specially for running. Nordic Grip Running fits perfectly on a running shoe and has carefully researched placement of the spikes for the most efficient traction for kick-off and movement when running. The grips work both on ice and snow, and let you run like freely even in winter.
Features:

• Placement of spikes is optimal for running
• Fits perfectly around running shoes
• Designed and produced for strength and endurance
• Works as well on snow as ice
• Small - Unisex(Men's US) 3-5
• Medium - Unisex(Men's US) 5-8
• Large - Unisex(Men's US) 8-12
• Extra Large - Unisex(Men's US) 11-13