The Therm-ic SuperMax was discontinued by Therm-ic in 2017.
Please see our current selection of Therm-ic boot heaters.
The SuperMax with the Classic insole is Therm-ic's number one selling rechargeable battery boot heating system and can be your best friend for warm feet. It's one of the easiest systems to install. All you need to do is remove your current insoles in your boots or shoes, trim the Classic insoles to the same size, insert them, plug in the batteries and turn them on.