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❄️ Stay Warm, Move Free, Look Sharp — Your Cold-Weather Essential
Smartwool's Men's Classic Thermal Merino Base Layer Bottom is a heavyweight, 100% Merino wool base layer designed for cold-weather outdoor activities. Featuring a slim fit with a 21.5" inseam, flatlock seams for chafe-free comfort, and advanced interlock knitting for superior breathability and moisture management, these USA-made bottoms deliver warmth, durability, and performance without bulk—perfect for hiking, skiing, and multi-sport adventures.


























| ASIN | B083QD5MJQ |
| Age Range Description | adult |
| Apparel Closure Orientation | Front |
| Apparel Closure Type | Snap |
| Apparel Fabric Stretch | No Stretch |
| Apparel Fabric Weight Class | Heavyweight |
| Apparel Occasion and Lifestyle | Outdoor |
| Best Sellers Rank | #96,062 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #55 in Men's Base Layers #64 in Men's Thermal Underwear Bottoms |
| Brand Name | Smartwool |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (638) |
| Fabric Stretchability | Non-stretchable |
| Fabric Type | 100% Merino Wool |
| Fit Type | Slim |
| Fit to Size Sentiment | Positive |
| Front Pleat Type | Flat Front |
| Front Pocket Count | 2 |
| Garment Size Country | Vietnam |
| Global Trade Identification Number | 00193392652350 |
| Import Designation | Made in the USA |
| Inseam Length | 21.5 inches |
| Item Length Description | Ankle Length |
| Item Type Name | Men's Merino 250 Baselayer Bottom |
| Item Weight | 11.68 ounces |
| Leg Style | Slim |
| Lining Description | Merino wool lining |
| Manufacturer | Smartwool |
| Manufacturer Part Number | SW016361001-XL |
| Material Type | Wool |
| Model Name | Merino 250 Base Layer Bottoms |
| Number Of Pockets | 5 |
| Number of Items | 1 |
| Occasion Type | hiking |
| Pants Form Type | Leggings |
| Pattern | Solid |
| Pattern Style | Solid |
| Pocket Description | Slant Pocket |
| Product Care Instructions | Machine Wash |
| Rise Style | High Rise |
| Shoulder to Bottom Hem Length | 28.67 inches |
| Sleeve Length Description | 3/4 Sleeve |
| Style Name | Merino 250 Base Layer Bottoms |
| Style Number | Smartwool |
| Team Name | Smartwool |
| UPC | 193392652350 |
| Unit Count | 1 Count |
| Waist Size | 40 inches |
| Weave Type | Interlock Knit |
| character | Sports |
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