Hotronic Power Plus Custom S4+ Foot Warmer. Features: The Foot Warmer Power Plus Custom comes with 2 Battery Packs, 1 Recharger, and 1 pair of Heating Elements with Cambrelle Covers. 1 pair of One Size Fits All. Heat Ready Insoles. For use in Hotronic's Heat Ready Insoles. On custom insoles, orthotics, or insoles of one's own choice.
- Four different heat settings for up to 21 hours of heated feet
- The Custom S4+ will install in al types of footwear and can be easily transferred between footwear
- For use while skiing, snowboarding, and other cold-temperature activities.
- Footbed required to use these heaters (either stock or custom)
- Redesigned power switch to minimize unintended outages