Looking for a sock that will keep your feet warm all day long? Tired of cutting your ski day short due to cold toes? It’s about time you experience the luxury of heated socks. Taking comfort and warmth to a whole new level, the Lenz Heat Sock 5.1 provides the most efficient battery management and comfort with three settings and up to 20 hours of heat. With reliable warmth radiating from the bottom of your foot to the top, the innovative Toe Cap provides all around heat. The left and right sides can be regulated separately, so you can customize the level of warmth to your needs. And the best part is that the lithium pack battery sits beneath the special comfortable leg band, so you hardly even notice it's there! Made from a high-quality fiber combination for a silky, comfortable, and warm fit, this sock is also machine washable for easy care. From ice skating rinks to chairlifts, stay warm all winter long with the Lenz Heat Sock 5.1!