Foxnovo Ice Traction Universal Slip-on Stretch fit Snow Ice Spikes (Grips Crampons Cleats) (L-Black) Color: mainly black. Size: Size Large (US: 8-11, EUR 39-46). Material: TPE (Thermoplastic Elastomer) and special non-slip studs. Excellent traction on ice and snow, and help to avoid those treacherous slippery conditions. Easily stretches over existing shoes or boots. Great for ice fishing, hunting, walking, jogging, hiking, running, snow shoveling, etc.