If your boots don't come pre-wired with a heating element, then just pull out your current insoles and replace them with the Therm-ic Perform insoles. Therm-ic Perform insoles plug into any Powerpack batteries to warm up your toes and feet. The perfect solution for skiers, boarders and anyone with chronically cold feet or bad circulation.
Perform insoles are top-quality Conform'able footbeds with anatomical 3D shape to better support your feet. The EVA foam construction will last for years and is an ideal insulating material to help keep your feet warm.
SIZING
Mondo 22.0-23.0, US men 3-4, US ladies 5.5-6.5, UK 36-37 = X-SMALL
Mondo 23.5-24.5, US men 5-6, US ladies 7-8, UK 38-39 = SMALL
Mondo 25.0-26.5, US men 7-8, US ladies 8.5-10, UK 40-42 = MEDIUM
Mondo 27.0-28.0, US men 9-10, US ladies 10.5-11.5, UK 43-44 = LARGE
Mondo 28.5-29.5, US men 11-12, UK 45-46 = X-LARGE
Mondo 30.0-31.0, US men 13-14, UK 46-47 = XX-LARGE
