We all want to stay as warm as possible during tough winters. You could always put more clothes on to warm yourself. If your feet are cold, you are still not going to be comfortable though. The ThermaCELL Heated Insoles could help. This is a foot warmer that uses wireless thermal technology to make you comfortable during winter. These have rechargeable lithium ion batteries inside. There are 3 settings for you to choose from. If you are tired of feeling cold during winters, the ThermaCELL Heated Insoles have you covered.