Having cold feet will no longer be a concern with the Lenz 5.1 Toe Cap Slim Fit heated socks. Those socks offer Toe Cap® integrated heating elements wrapping around both the foot for the ultimate comfort. They are ergonomically knitted for an optimal fit and provide comfortable support. Shin protectors and reinforcements on the toes and heel help to minimize pressure points. Made of merino wool and silk blend, those heated ski socks are comfortable to wear and dry quickly. The lightweight rechargeable batteries are sold separately and sit barely noticeable under the special comfort cuff. The heat can be controlled directly on the battery or also through the Lenz Heat app on your smartphone.