Powerpower Anti Slip Traction Cleat Crampons for Snow and Ice Protect Shoes Black High quality material - Silicone, not easy to break. Simple and effective winter footwear traction device for instant confidence and safety in snowy or icy walking conditions. Skid Lock Treated non-rusting steel for traction. Spikeless - will not damage most indoor surfaces. Easily fits over almost any type of shoe and provides full toe-to-heel protection,ultralight and compact for easy storage.