Wireless heated insoles are great for keeping your feet warm during winter for optimal blood circulation in your feet. Soft material and ultra-thin thickness: Our heated insoles are made of high-performance material with stronger elasticity and better breathability, soft and bendable. Wide application: Cordless foot warmer keeps your feet warm in the cold winter. Protect against the cold at home, riding outdoors or working outdoors in the cold. Perfect for hunting, skiing, fishing, hiking, dog walking, snowboarding, motorcycles, horseback riding and sporting events. It is also a perfect warm gift for parents and friends on Thanksgiving, Christmas and New Year. Cut to fit: Insole measures approximately 27 to 27.5 cm, unisex design to fit most men and women. Heated insoles can be trimmed to fit almost any shoe size and easily fit into a shoe or boot.