Top 10 Best Mens Base Layer Bottoms [2025]
Disclaimer: As An Amazon Associate I Earn From Qualifying Purchases.
| No | Product | Score | Action |
|---|---|---|---|
| 1 | Minus33 Merino Wool 709 Katmai Men's Expedition Bottom Black Large | 9.8 | Buy On Amazon |
| 2 | Carhartt Men's Force Heavyweight Thermal Base Layer Pant | 9.6 | Buy On Amazon |
| 3 | Smartwool Merino 250 Baselayer Bottoms 2021 - Men's Black X-Large | 9.6 | Buy On Amazon |
| 4 | Merino.tech Merino Wool Base Layer Mens Bottom Pants 100% Merino Wool Midweight Thermal Underwear Long Johns + Wool Socks (X-Large, Black 250) | 9.4 | Buy On Amazon |
| 5 | Smartwool Merino 150 Baselayer Bottom - Men's Black Medium | 9.4 | Buy On Amazon |
| 6 | MERIWOOL Mens Base Layer 100% Merino Wool Thermal Pants Black | 9.2 | Buy On Amazon |
| 7 | Carhartt Men's Force Midweight Classic Thermal Base Layer Pant | 9.2 | Buy On Amazon |
| 8 | DEVOPS Men's Thermal Compression Pants | 8.4 | Buy On Amazon |
| 9 | Duofold Men's Mid Weight Wicking Thermal Pant | 8.2 | Buy On Amazon |
| 10 | Smartwool Merino 250 Baselayer Bottoms 2021 - Men's Charcoal Heather Small | 8.2 | Buy On Amazon |
1. Minus33 Merino Wool 709 Katmai Men’s Expedition Bottom Black Large
- QUALITY EXPEDITION BASELAYER: 100% Merino Wool is super soft and extremely comfortable.
- CRAFTED TO FIT: Sizes XS to 3XL and Tall Sizes M-Tall to XL-Tall.
- EXPERIENCED BRAND: Although there are many copy-cats on the market today, Minus33 has been a trusted brand since 2004.
- IMPORTED: As the legacy of a 100+ year old USA based woolen company, Minus33 knows quality and comfort in Merino Wool.
- TECHNICAL DETAILS: 100% 18.
2. Carhartt Men’s Force Heavyweight Thermal Base Layer Pant
- Poly-wool blend regulates temperature, fast dry wicks away sweat and fights odor
- Rugged flex technology for ease of movement
- Smooth flat lock seams and tagless label enhance comfort
- Concealed dry low-stitch waistband and contoured front for comfort
- Strategic seam placement for maximum comfort and reduced chafing
3. Smartwool Merino 250 Baselayer Bottoms 2021 – Men’s Black X-Large
- 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance.
- Fit updated to improve functionality while enhancing aesthetics
- Merino-covered elastic interior waistband and traditional fly design
- Flatlock seam construction designed to minimize chafing
- Slim Fit, Size M inseam: 30″ (76 cm), Knit in Vietnam: 100% Merino Wool, Garment Weight: 228 g = 8.
4. Merino.tech Merino Wool Base Layer Mens Bottom Pants 100% Merino Wool Midweight Thermal Underwear Long Johns + Wool Socks (X-Large, Black 250)
- FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino Wool Pants for Men Midweight 250 g/m² + Merino Wool Hiking Socks.
- SUPER SOFT & COMFORTABLE – 100% Superfine 18.
- MOISTURE WICKING & ODOR RESISTANT – Merino Baselayer Men natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.
- EASY CARE – Washer/dryer safe.
- LIFETIME WARRANTY – All Merino.
5. Smartwool Merino 150 Baselayer Bottom – Men’s Black Medium
- A year-round favorite, the Merino 150 Base Layer Bottoms work hard to keep you comfortable everywhere, from the ski lifts to the campsite.
- With an updated fit to improve functionality while enhancing aesthetics, these bottoms stay durable while 100% Merino next to skin keeps you comfy and ready for more action.
- This gear is built for four seasons of adventure.
- Fully functional fly
- Merino-lined, 1.
6. MERIWOOL Mens Base Layer 100% Merino Wool Thermal Pants Black
- Package Includes: 1 – Men’s 250g/m² merino wool thermal leggings
- SUPER SOFT: 100% all natural superfine 18.
- BREATHABLE: Keeping you cool in summer and warm in winter, MERIWOOL’s 250g/m2 weight interlock-knit Merino wool can be used as a base layer or mid-layer, but won’t weigh you down.
- WICKING & ODOR RESISTANCE: Merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather.
- EXCEPTIONAL CUSTOMER CARE: If your MERIWOOL Men’s Leggings don’t perform to your satisfaction, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, exchange, or replacement.
7. Carhartt Men’s Force Midweight Classic Thermal Base Layer Pant
- Waffle knit traps heat, fast dry wicks away sweat and fights odor
- Rugged flex technology for ease of movement
- Smooth flatlock seams and tagless label enhance comfort
- Concealed dry low-stitch waistband and contoured front for comfort
- Strategic seam placement for maximum comfort and reduced chafing
8. DEVOPS Men’s Thermal Compression Pants
- Ultra Soft & Warm】 Thermal tech fleece fabric of the baselayer caresses the skin so naturally providing maximum comfort and softness.
- Stretchy & Durable】 Spandex added for extra stretch and shape retention; close-fitting style does better in retaining body heat to keep you warm.
- Versatile Performance】 Thermal leggings with ultra soft hand feel and heat-retention is a perfect option during various indoor activities, outdoor excursion and recreational activities.
- Choose Pocket or Non Pocket Style】 Positioned well for hand placement are great fit and comfort for walking and running.
- Easy Care】 Machine Washable
9. Duofold Men’s Mid Weight Wicking Thermal Pant
- Classic 2-ply cotton-rich thermal underwear
- Choose these base-layer bottoms for everyday warmth during low activity levels
10. Smartwool Merino 250 Baselayer Bottoms 2021 – Men’s Charcoal Heather Small
- 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance.
- Fit updated to improve functionality while enhancing aesthetics
- Merino-covered elastic interior waistband and traditional fly design
- Flatlock seam construction designed to minimize chafing
- Slim Fit, Size M inseam: 30″ (76 cm), Knit in Vietnam: 100% Merino Wool, Garment Weight: 228 g = 8.