Feel safe in winter: Get a good grip on winter roads with these robust crampons. These anti-slip shoe covers have 18 highly effective steel studs/crampons for perfect grip on winter surfaces such as ice and snow. Easy to put on and take off: Attached with a strap/chain device. Works just as well when walking as when running. The crampons are very easy to put on and just as easy to take off. A reliable anti-slip device so you can feel safe! Specifications: Material: Silicone and stainless steel Size: L (fits shoe size 39-44) The package contains: 1 pair of crampons Size guide: Tip: If you are going to use these crampons on very heavy, thick boots, we recommend that you choose one size larger. S: Shoe size 31 - 35 M: Shoe size 35 - 39 L: Shoe size 39 - 44 XL: Shoe size 44 - 48 Feel safe with a good grip With 18 effective crampons/steel studs Easy to put on and take off