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The ThermaCELL Remote-Controlled ProFLEX Heated Insoles are the extended solution to cold feet. These wireless, battery-powered flexible polyurethane insoles easily slip into your boots or shoes and the included fingertip remote control lets you choose the appropriate heat setting: medium (100°F) or high (111°F). Designed to keep your feet warm, not hot, to avoid having your feet sweat and freeze. They are breathable, shock absorbent, and conduct heat well for optimum comfort, and are highly water-resistant, to protect the electronics from moisture.
Two rechargeable lithium-ion polymer battery packs are included, one for each insole, and charge in about 4 hours with a maximum runtime of 5 hours. The battery packs can be installed and removed without having to take the insole out of the shoe or boot. Its battery covers are made from comfortable and resilient Poron: an antimicrobial, shock-absorbing cushion. The ProFLEX are offered here in size small to fit men's sizes 3.5-5 or women's 4.5-6, and can be trimmed to fit virtually any shoe.