Advanced warmth, comfort, and control. The Merino 2.0 Heated Socks combine the natural softness and insulation of a premium merino wool blend with modern heating technology. Designed with an over-the-calf length, reinforced heel and toe, they deliver lasting comfort and durability through every step. A discreet YKKA(R) zippered pocket at the calf secures the battery, and best of all they&';re wireless so you adjust temperature effortlessly without breaking stride. Perfect for cold-weather work, hunting, skiing, or everyday wear, these socks keep you warm, dry, and in control no matter the conditions.