Heated Thermal Underwear with 22 Heating Zones, USB

A base layer that heats itself

This thermal underwear has heating zones woven into the fabric: 12 in the top, 10 in the long johns, 22 in the full set. It is powered by USB from a power bank that sits in a pocket (power bank not included), so you choose how long it runs. Three settings cover about 77 to 131 °F (25 to 55 °C), and the extra-thick fleece lining keeps the warmth close even when the heat is off. Pick the men's or women's cut in black or gray, as a set, top only or pants only.

Why you'll love it

• USB powered: Connect your own power bank in the pocket and press the button to start.
• Three heat levels: Choose between about 77, 104 and 131 °F (25 to 55 °C).
• Up to 22 zones: Twelve zones in the top and ten in the pants warm back, belly, knees and more.
• Fleece lined: Thick 351 to 400 g/m2 fabric with a brushed inside for warmth without bulk.
• Machine washable: Take out the power bank and wash the set as normal.

Perfect for: ice fishing, winter commutes, outdoor work, skiing and cold stadium seats.