Little Hotties Heated Insoles are the ideal solution for cold, wet feet. Made with multiple layers of insulating materials, these insoles help retain your body's natural heat, while absorbing unwanted moisture and providing cushioning comfort. Unisex size. Trim to fit, women's 5 to men's 12. Radiantex and wool felt layers wick away moisture and lock in body heat. Thermal rated to -13 degrees F.