Therm-ic Comfort S.E.T Heated Socks w/ 3000B Batteries One Color, 39-41

The Therm-ic Comfort S. E. T. Heated Socks fit inside a ski boot because the heating runs through one thin elastic seam above and below the toes, so the sock keeps its stretch around the foot. A merino wool blend with a thermoregulating knit insulates the foot, and the set comes with two rechargeable batteries. What Our Gearhead(R) Experts Are Saying:"I run level 1 for a full day of resort laps and save level 3 for the coldest stretch. The top setting lasts only a few hours, so I don't leave it on all day."