The ThermaCELL Heated Insoles ProFLEX is a battery powered, insole foot warmer that is the perfect solution to any cold feet. The insoles can easily and quickly slip into shoes or boots and includes a remote control with 3 heat settings. It also includes two rechargeable, removable batteries that can be charged using a wall charger or any USB port in four hours. The batteries that initially comes with the package can be easily changed without removing the insole from the shoe or boot. Once fully charged, the insole can last up to five hours of use. These insoles are shock absorbent, breathable and are made from flexible polyurethane material. This makes it easy to use for a wide variety of shoes during the winter and cold weather.
Small = 3 ½ - 5 4 ½ - 6
Medium = 5 ½ - 7 6 ½ - 8
Large = 7 ½ - 9 8 ½ - 10
X-Large = 9 ½ - 11 10 ½ - 12
XX-Large = 11 ½ - 13 12 ½ - 14
Extra battery pack is available here - ThermaCELL Heated Insoles ProFLEX - Battery Pack
Car charger is available here - ThermaCELL Heated Insoles - Car Charger