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USB-Powered Heated Base Layer Set for Men & Women – Thermal Long Johns with Warming Zones | Thomler
Stay Warm All Day with USB-Powered Heating Technology
Experience next-level comfort with this innovative base layer set that delivers targeted warmth exactly where you need it. Featuring built-in heating elements powered by any USB source, soft knit fabric, and flatlock seams for chafe-free wear, this two-piece thermal set adapts to your comfort level throughout the day. Whether you're heading outdoors for winter sports, working in cold conditions, or simply want to stay cozy at home without cranking up the heat, this heated underwear gives you control over your personal climate. The stretchy waistband and fitted ankle cuffs keep everything in place under your clothes, while the gentle heating zones eliminate cold spots without overheating. Perfect for skiing, snowboarding, outdoor work, cold-weather commuting, and everyday winter comfort. Power it from a portable battery pack, laptop, or wall adapter—no bulky battery packs required. The breathable knit construction wicks moisture while keeping you warm, and the flatlock seams prevent irritation during all-day wear. Available in both men's and women's fits, this heated base layer set is your secret weapon against winter chill.
Why You Need This
- Built-In Heating Zones: Strategically placed warming elements target key areas to banish cold spots without making you overheat.
- USB-A Power Connection: Plug into any power bank, laptop, or adapter—no proprietary batteries to replace or recharge separately.
- Flatlock Seam Construction: Smooth, flat seams reduce rubbing and skin irritation even during extended wear under multiple layers.
- Snug, Layerable Fit: Elastic waistband and fitted ankle cuffs create a secure base layer that stays put under work clothes or winter gear.
- Two-Piece Versatility: Wear the long-sleeve crew top and matching bottoms together or separately depending on your activity and temperature needs.
- Soft Knit Fabric: Comfortable against skin all day while maintaining breathability to prevent overheating when you move.
Built for Real Winter Life
This heated thermal set works hard whether you're skiing down a mountain, building on a job site, working from a chilly home office, or commuting through freezing temperatures. The lightweight design layers invisibly under everyday clothing, while the reliable USB heating gives you warmth on demand. Choose from black or heather gray in sizes S through XXXL. Each set includes both the long-sleeve crew-neck top and matching thermal bottoms. We ship orders within 24–48 hours, and every purchase is backed by our 30-day return policy and free US shipping. Stay warm your way—order yours today while supplies last.
Free shipping across the United States — always, with no minimum order.
Every order is carefully packed and sent with Track & Trace, so you can follow your package every step of the way.
Order today? We ship the next business day.
Not completely happy? You have 30 days to return your purchase.
On top of that, we offer a 3-year warranty against manufacturing defects — your investment is in good hands.
Made for everyday
Practical pieces you’ll actually use.
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Chosen for quality you can feel.
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Yours, the moment we pack it
- Hand-packed with care
- Checked before it ships
- Arrives exactly as pictured
Straight From Your Camera Roll
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A Note From Our Founder
When I started Thomler, I wanted one thing — to make it easy to find pieces that actually make a home feel like yours, without the markup. Every item we carry is one I'd happily put in my own home. And if it's ever not right, you've got 30 days to send it back, no stress. I'm only ever an email away.