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Stay warm and comfortable with Thermajohn Long Johns Thermal Underwear for Men. Made from 92% polyester and 8% spandex, this fleece-lined base layer set provides softness, warmth, and flexibility during cold weather. The breathable, moisture-wicking fabric helps keep you dry, while four-way stretch allows comfortable movement without bunching or chafing. Ideal for outdoor activities, everyday layering, or relaxing at home. Available in multiple colors, sizes, and styles.

| ASIN | B07JPLYHHT |
| ASIN | B0HK44VVRN |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | High Stretch |
| Apparel Fabric Weight Class | Heavyweight |
| Best Sellers Rank | #21,677 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #107 in Men's Thermal Underwear |
| Brand Name | Thermajohn |
| Collection Name | Winter |
| Color | Navy |
| Customer Reviews | 4.6 4.6 out of 5 stars (29,345) |
| Date First Available | September 17, 2026 |
| Department | mens |
| Fabric Type | 92% Polyester, 8% Spandex |
| Fit Type | Stretch |
| Fit to Size Sentiment | Positive |
| Garment Size Country | United States |
| Global Trade Identification Number | 00810000411146 |
| Import Designation | Imported |
| Item Type Name | Base Layer Set |
| Manufacturer | Thermajohn |
| Manufacturer Part Number | J-t-m-1836 |
| Material Type | Polyester |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Package Quantity | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Size | X-Small |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Name | Crewneck Set |
| Style Number | J-t-m-1836 |
| UPC | 810000411146 |
| Unit Count | 1 Count |
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