Therm-ic Classic Heated Insoles are flat insoles with a pre-installed heating element built into the toe area. All you do is trim the insoles to the size you require, slide them into your shoes or boots and plug in your batteries and enjoy warm feet. You'll receive 2 insoles that are about 1/8 inch thick.
The Therm-ic Classic insoles will work with the following batteries. Basic, Max, SuperMax, Liion, and Smartpack 950, 1200, and 1600. The TrimFit system IS NOT COMPATIBLE with the Therm-ic C-Pack batteries.
The Classic insoles are designed to work with the following erm-ic btteries:
Smartpack 950 bateries
Smartpack 1200 batteries
Smartpack 1600 battries
Therm-ic Classic insoles fit the following sizes
Ski boot mondo sizes- 22.0 - 31.5
USA men's shoe sizes- 5 - 13.5
USA ladies shoe sizes- 6 - 11.5
UK shoe sizes- 36 - 48
See the heated insole comparison chart to help determine which insole will best fit your needs.
Our comments; If you're looking to make it easy to install, the Classic insole is a good choice. And it fits many feet shapes because its flat. Sometimes an arch support is not what you want.