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❄️ Don’t just survive winter—own it with Thermajohn Thermal Long Johns!
Thermajohn Long Johns Thermal Underwear for Men is a fleece-lined, high-stretch base layer designed to provide superior warmth, moisture management, and all-day comfort. Crafted from 92% polyester and 8% spandex, this charcoal crewneck set is perfect for layering in cold weather, whether at the office, gym, or home. With a 4.6-star rating from over 18,000 users, it’s a trusted choice for staying dry, warm, and mobile.

| ASIN | B018DQI4W8 |
| ASIN | B0HK44VVRN |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Best Sellers Rank | #143,458 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #116 in Men's Thermal Underwear |
| Brand Name | Thermajohn |
| Collection Name | Winter |
| Color | Navy |
| Customer Reviews | 4.6 4.6 out of 5 stars (18,590) |
| Date First Available | September 17, 2026 |
| Department | mens |
| Fabric Type | 92% Polyester, 8% Spandex |
| Fit Type | Stretch |
| Global Trade Identification Number | 00810000410576 |
| Import Designation | Imported |
| Item Type Name | Base Layer Set |
| Item Weight | 13 ounces |
| Manufacturer | Thermajohn |
| Manufacturer Part Number | LYSB018DQI4W8-SPRTSEQIP |
| Material Type | Polyester |
| Neck Style | Crew Neck |
| Package Quantity | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Size | X-Large |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Name | Crewneck Set |
| Style Number | J-t-m-1836 |
| UPC | 810000410576 |
| Unit Count | 1 Count |
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