Conquer the chilliest conditions with the Therm-ic Ultra Warm Nordic Ski Socks, crafted specifically for Nordic skiing enthusiasts. These socks feature a sleek design and Smart Elastic Technology, ensuring they fit seamlessly into your boots for unparalleled comfort and precise movement. The discreet S.E.T heating line gently warms your toes without compromising the sock's fit, while polyamide fibers provide excellent support and stability during your activities. Made from merino wool, these socks excel in thermal insulation and moisture control, keeping your feet dry and cozy even during intense workouts. The knee-high design offers additional warmth and protection against the cold. Compatible with S-Pack batteries, though batteries are not included. Exceptional comfort with thin construction and Smart Elastic Technology for a perfect boot fit Subtle toe warmth from the integrated S.E.T heating line without altering sock fit Merino wool for natural insulation and breathability, mainta