★★★★★
Good quality
Adam—January 3, 2026✓ Verified purchase
Good quality and comfortable it keeps me warm in the cold days specially I work outdoors. A bit pricy but I think it’s worth it. Read more
Smartwool
Smartwool Mens Classic Thermal Merino Base Layer Bottom
$98.99
size6
About this item
- 100% Merino Wool
- Made in the USA
- COLD WEATHER BASE LAYER. Keep your ski or hiking boots free of bulk and friction with our 3/4 Bottom. Merino wool provides ultimate comfort, while a newly redesigned base layer pants fit helps reduce sag and excess fabric—perfect for layering.
- SLIM FIT. Designed to meet the demands of outdoor adventuring, these slim fit bottoms show off a slimming silhouette while offering unrestricted movement through the legs. Inseam: 21.5"
- CLASSIC THERMAL MERINO. Ideal for cold-weather activities where warmth and breathability are crucial, this midweight fabric used a Merino wool construction that helps move moisture away from skin to keep you warm and dry.
- FUNCTIONAL FEATURES. Go far, feel good with thoughtful tech to keep you trekking comfortably — interlock knitting enhances breathability, thermoregulation and moisture-wicking while flatlock seams minimize chafing for greater comfort.
- GO FAR. FEEL GOOD. From wool socks to base layers for men, women and kids, we aim to provide the highest quality apparel for your outdoor adventures with a commitment to environmental sustainability, racial equity and inclusivity.
$98.99
Currently unavailable
Fulfillment
Ships fromVentari
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Technical specifications
| item_package_dimensions_l_x_w_x_h | 10.28 x 8.19 x 1.46 inches |
|---|---|
| package_weight | 0.24 Kilograms |
| item_dimensions_lxwxh | 4 x 4 x 2 inches |
| brand_name | Smartwool |
| model_name | Classic |
| color | Black |
| material | Wool |
| suggested_users | mens, unisex-adult |
| number_of_items | 1 |
| manufacturer | Smartwool |
| part_number | SW016361001 |
| style | Merino 250 Base Layer Bottoms |
| size | X-Small |
| sport_type | Hiking |
| best_sellers_rank | #134,226 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #59 in Men's Base Layers |
| date_first_available | June 17, 2020 |
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From the brand
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Customer reviews
4.7574 ratings
- 5★88%
- 4★13%
- 3★0%
- 2★0%
- 1★0%
Customers say
Customers find these pants provide excellent warmth, with one mentioning they work well for cold nights on patrol, and appreciate their comfort and quality.
★★★★★
soooo good soooo warm
Tom—February 8, 2026✓ Verified purchase
i've tried base layers from patagonia, arc'teryx, icebreaker. none of them are as warm or as comfortable as the smartwool. very happy to find XS stock on amazon as it is not available anywhere else. Read more
★★★★★
Worth the $$
lgh—January 15, 2026✓ Verified purchase
So comfortable; looking forward to being in below freezing with these on! Read more
★★★★★
As described and comfortable
GL—December 18, 2025✓ Verified purchase
Great. Read more
★★★★★
The feel and warmth
Rita Whitmire—February 21, 2026✓ Verified purchase
It was a gift. He loved them Read more
★★★★★
It's good
jeff burghardt—March 9, 2026✓ Verified purchase
It's good Read more
★★★★★
Husband lives in them.
Customer—March 1, 2026✓ Verified purchase
Husband lives in them. Read more
★★★★☆
Designed for saggy stomach.
R K Amazon—January 20, 2026✓ Verified purchase
Comfortable and warm but be aware that these long johns are designed for the typical out of shape American male with a large beer belly. So if you are fit and trim you will have to roll the waistband to keep it from being saggy across your belly. I wish they had a design for healthy men without saggy stomachs. Read more
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