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Never freeze again with the patented Toe Cap® technology. The flat, sewn-in heating element is not bulky and provides all-round warmth for the toes - up to 14 hours. The knee-high heat sock 5.0 toe cap® has an integrated shin protector and protectors in the toe and heel area. Thanks to a ring bandage, the socks do not slip on the foot. The sophisticated material mix of merino wool, silk and functional fibres dries quickly and wicks moisture away efficiently. The rechargeable lithium pack is attached to the sock waistband with snap fasteners. The temperature can be conveniently controlled on the smartphone with the free Lenz heat app or directly on the lithium pack.