One-piece Get-A-Grip covers virtually all types of footwear for walking or running on ice and snow. Boasts natural rubber that is 3-dimensionally molded to fit footwear and retain elasticity in extreme temperatures. Replaceable tungsten-carbide spikes grip firmly and release when caught, rather than tearing or causing wearer to trip. Increased traction helps prevent falls and quick slips that can pull muscles and cause fractures and back injuries.For all outdoor job site and recreational applications. Available in Advanced, Xtreme (shown), and Ultra styles to fit users of all ages. Sure Foot Corp., Grand Forks, ND