Made form special cold resistant rubber.It will stay flexible at minius 39c. They are tough and durable with non-slip metal studs. These ice grips give excellent traction. They come in 2 sizes 3 to 6 and 7 to 12. Just fasten the grips to your shoes. To stop premature wear the grippers should be taken off when walking on pavements or rocks. Never slip on ice or hard packed snow again. These ice grips will give you the security you need to go out and walk with safety. Our ice grips are simple put on and will stretch over the shoe and heel. Can be put on and taken off in a few sseconds and can be stored in pocket or handbag. Keep in  the car boot for those days when it is dangerous to walk. Will last for years. visit our shop in glasgow