B08H5Y56L6 Hotronic Upgraded FootWarmer S4+ Custom, Latest Version

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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
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