Rechargeable Heated Insoles w/App

This foot warmer features app control for adjusting temperatures from 86°F to 158°F. They include a 5000mAh battery providing up to 14 hours of heating, with CE FCC RoHS certification and UL94-V0 flame-retardant material. It has a removable battery design to prevent short circuits and allow battery replacement for extended use. The price drops from $89.99 to $42.99. Shipping is free for Prime members.