One detail to highlight is that they aremadeof 100% natural materials such as wool (the sole of the slipper) and cotton (the rest of the product), because we know that cold feet are due to poor circulation and the natural materials absorb the sweat that can be produced to prevent your feet from getting cold. The best gift for your health, microwavable seed slippers. All our models come with instructions for use and a beautiful box that makes a great gift. If you want to give a useful, beautiful and original gift, don't hesitate a second longer and buy the heated slippers. It will be a complete success and when they discover all the possibilities it offers, they will thank you for a long time to come.