Lenz Heated Socks, outdoor adventurers, skiers, mountain climbers, hunters, outdoor photographers, patients suffering from Raynaud's syndrome, Toe Cap® heating element, material composition, padding, specific applications, washing machine, advanced technology, high comfort, warmth, enjoyment, cold-temperature adventures, heat sock 4.1 toe cap®, sewn-in heating element, warm feet, increased elasticity, calf area, suitable for people with stronger calves, comfort cuff, prevent slipping, knitted left/right, perfect fit, padded reinforcements, toes, heels, natural merino wool, technical fibers, absorb moisture, keep feet warm, comfort cuff, press studs, fix, lithium pack, purchased separately, operated with a button, smartphone app.