Men's Thermal Underwear Long Heated Base Layer Pants USB Rechargeable Slim Fit
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Size Finder · Men
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Free shipping · Order today, arrives in 5–8 business days
- 90-day returnsPrintable return label by email
- Ships in 2–4 business daysTracked delivery in 3–4 days
- Real people, real answersEmail replies within a few hours
- Designed in the USAConsidered pieces, made to last
Heated Thermal Underwear Pants with USB Rechargeable Technology
Mens thermal underwear pants engineered for serious cold-weather performance. The slim fit design hugs your body without restricting movement, while the soft synthetic fabric and flatlock seams deliver comfort that lasts through long days outdoors. Perfect for winter sports, cold-weather commuting, outdoor work, and any activity where staying warm matters.
One of our most-loved pieces this season for anyone serious about layering through winter.
Selling fast in all sizes. Ordered today, dispatched within 24-48 hours.
Why You'll Love These Heated Pants
- Slim fit design: Sits close to your body without bulk, letting you layer comfortably under regular clothing or wear as standalone heated base layer pants.
- Soft, stretchy synthetic fabric: Moves with you through any activity while maintaining durability and quick-dry performance.
- Versatile warmth for every season: Whether you're tackling winter sports, heading out for outdoor work, commuting through freezing temperatures, or enjoying cold-weather activities, these rechargeable heated pants adapt to your needs.
- Multiple heating zones with three temperature levels: Customise your warmth with integrated heating elements controlled via an easy-access square power button—find your perfect comfort setting instantly.
- Flatlock seams and secure battery pocket: Reinforced stitching eliminates chafing, while the zippered battery pocket keeps your power bank secure and accessible.
Material & Care
- Fabric: Synthetic blend with integrated heating elements
- Construction: Flatlock seams for reduced chafing and durability
- Features: Elastic waistband, full-length legs, zippered battery pocket for power bank storage
- Power: USB rechargeable with three adjustable temperature settings
- Care: Follow manufacturer washing instructions to preserve heating elements and fabric integrity
Available in sizes XXS through 2XL to ensure a proper fit for every body type. We recommend checking the size chart before ordering to find your ideal fit. These heated thermal underwear pants are designed to fit snugly as a base layer while allowing freedom of movement for active pursuits.
Don't let winter slow you down. Grab your heated base layer pants while stock lasts—this season's demand for quality rechargeable heated apparel has been exceptional. Order today and receive your electric heated pants within 48 hours, backed by our money-back guarantee if you're not completely satisfied.
Size Guide
Find your fit.
Our pieces follow standard US sizing. If you're between sizes, choose the larger size for outerwear and knitwear and your usual size for dresses. The Size Finder on every product page gives you a personal recommendation in seconds.
Women's clothing
| Size | US | Bust (in) | Waist (in) | Hips (in) |
|---|---|---|---|---|
| XS | 0–2 | 31–32 | 24–25 | 34–35 |
| S | 4–6 | 33–34 | 26–27 | 36–37 |
| M | 8–10 | 35–36 | 28–29 | 38–39 |
| L | 12–14 | 37.5–39 | 30.5–32 | 40.5–42 |
| XL | 16 | 40.5–42 | 33.5–35 | 43.5–45 |
| XXL | 18 | 43.5–45 | 36.5–38 | 46.5–48 |
Men's clothing
| Size | Chest (in) | Waist (in) | Neck (in) |
|---|---|---|---|
| S | 35–37 | 29–31 | 14–14.5 |
| M | 38–40 | 32–34 | 15–15.5 |
| L | 41–43 | 35–37 | 16–16.5 |
| XL | 44–46 | 38–40 | 17–17.5 |
| XXL | 47–49 | 41–43 | 18–18.5 |
Shoes
| Foot length (in) | Women US | Men US | EU |
|---|---|---|---|
| 9.0 | 6 | – | 36–37 |
| 9.4 | 7 | – | 37–38 |
| 9.7 | 8 | 6.5 | 38–39 |
| 10.0 | 9 | 7.5 | 40 |
| 10.3 | 10 | 8.5 | 41 |
| 10.6 | 11 | 9.5 | 42–43 |
| 11.0 | – | 10.5 | 44 |
| 11.3 | – | 11.5 | 45 |
| 11.7 | – | 12.5 | 46 |
Still unsure? Email info@fifthavenuestyle.com for personal sizing help.
Every piece is made from carefully selected materials. Please follow the care label inside the garment. As a rule of thumb: wash knitwear cold and dry it flat, and have tailored outerwear professionally dry cleaned to keep its shape for years.
Free US shipping on every order. Orders are processed within 2–4 business days, then delivered within 3–4 business days. You'll receive a tracking number by email as soon as your order ships.
90-day returns. Return unworn items in their original condition within 90 days of delivery. Email us and we'll send you a printable return label; the label cost is deducted from your refund, except for damaged, faulty or incorrect items. Full return policy
