Top 9 400g Merino Wool Base Layer – Men’s Thermal Underwear Tops

As an Amazon Associate I earn from qualifying purchases.

1. MERIWOOL

#ad

MERIWOOL Mens Base Layer 100% Merino Wool Heavyweight 400g Thermal Shirt for Men Black

#ad
MERIWOOL #ad - Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Men’s size options: S to 2XL. For best results: hand wash and lay flat to dry. Super soft: 100% all natural superfine 18. 5-micron merino wool ensures comfort all day – no itch! EASY CARE: Heavyweight long sleeve crew top shirt is machine-washable and dryer-safe, so it’s ready when you are for your next adventure.

Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers. Package includes: 1 - men’s 400g/m² merino wool thermal crewneck top – Black / M. Includes a 1-year limited manufacturer’s warranty, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, which covers manufacturing and material defects. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable.

The perfect base or mid layer for cold to freezing conditions make these thermal tops our warmest and thickest base layers yet! COMFORTABLE & CONVENIENT: These quick-drying shirts with a UPF Rating 50+ are perfect for your next trip, whether your camping, hiking, skiing, hunting, playing sports, or partaking in any outdoors activity. Exceptional customer care: if your meriwool men’s heavyweight baselayer crew doesn’t perform to your satisfaction, exchange, or replacement. 400g of warmth: our most popular 250g midweight crewnecks just got an upgrade! take your warmth to the next level with our new 400g heavyweight crewneck tops.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad

2. MERIWOOL

#ad

MERIWOOL Mens Base Layer 100% Merino Wool Heavyweight 400g Thermal Pants Black

#ad
MERIWOOL #ad - 400g of warmth: upgrade from our most popular 250g midweight bottoms to our new 400g heavyweight bottoms! these interlock-knit merino wool thermal legging are perfect as base layer or mid layer for cold to freezing conditions; our warmest and thickest base layer yet! COMFORTABLE & CONVENIENT: Quick-drying pants with a UPF Rating 50+, they feature a loop for hang drying while camping, skiing, playing sports, working, hunting, hiking, or partaking in any outdoors activity.

Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Men’s size options: S to 2XL. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Includes a 1-year limited manufacturer’s warranty, exchange, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, which covers manufacturing and material defects.

Super soft: 100% all natural superfine 18. 5-micron merino wool ensures comfort all day long – no itch! easy CARE: Your thermal pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so it’s ready when you are for your next adventure. Exceptional customer care: if your meriwool men’s heavyweight baselayer bottoms don’t perform to your satisfaction, or replacement. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers. Package includes: 1 - men’s 400g/m² merino wool thermal leggings.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad

3. MERIWOOL

#ad

MERIWOOL Womens Base Layer 100% Merino Wool Heavyweight 400g Thermal Shirt for Women Black

#ad
MERIWOOL #ad - The perfect base or mid layer for cold to freezing conditions make these thermal tops our warmest and thickest base layers yet! COMFORTABLE & CONVENIENT: These quick-drying shirts with a UPF Rating 50+ are perfect for your next trip, whether your camping, hiking, skiing, playing sports, hunting, or partaking in any outdoors activity.

400g of warmth: our most popular 250g midweight crewnecks just got an upgrade! take your warmth to the next level with our new 400g heavyweight crewneck tops. Package includes: 1 - women’s 400g/m² merino wool thermal crewneck top – Black / M. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Includes a 1-year limited manufacturer’s warranty, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, which covers manufacturing and material defects.

Women’s size options: XS to L. For best results: hand wash and lay flat to dry. 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 women’s heavyweight baselayer crew doesn’t perform to your satisfaction, exchange, or replacement. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad

4. MERIWOOL

#ad

MERIWOOL Womens Base Layer 100% Merino Wool Heavyweight 400g Thermal Pants Leggings for Women Black

#ad
MERIWOOL #ad - Includes a 1-year limited manufacturer’s warranty, exchange, which covers manufacturing and material defects. 400g of warmth: upgrade from our most popular 250g midweight bottoms to our new 400g heavyweight bottoms! these interlock-knit merino wool thermal legging are perfect as base layer or mid layer for cold to freezing conditions; our warmest and thickest base layer yet! COMFORTABLE & CONVENIENT: Quick-drying pants with a UPF Rating 50+, playing sports, skiing, they feature a loop for hang drying while camping, hiking, hunting, working, or partaking in any outdoors activity.

Package includes: 1 - women’s 400g/m² merino wool thermal leggings – Choose size & color. Exceptional customer care: if your meriwool women’s heavyweight baselayer leggings don’t perform to your satisfaction, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, or replacement. Super soft: 100% all natural superfine 18.

5-micron merino wool ensures comfort all day long – no itch! easy CARE: Your thermal pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so it’s ready when you are for your next adventure. Women’s size options: XS to L. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable in hot or cold weather. For best results: hand wash and lay flat to dry.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad

5. MERIWOOL

#ad

MERIWOOL Women's Half Zip Base Layer Top 400g Heavyweight Merino Wool Sweater Small Black

#ad
MERIWOOL #ad - Naturally resistant to odor, 100% Merino wool, so you can pack less and travel light. Shop risk-free: backed with a 90-day guarantee and a 1-year manufacturer warranty, we’re proud to stand by the quality of our thermal long sleeve performance pullover. Size: xs to L.

Luxuriously heavyweight at 400g, merino is an environmentally friendly fabric that saves water with fewer washes. Trusted quality: thanks to 100% merino wool and an 19. 5 micron jersey knit, our half-zip sweaters are super-soft and comfortable. If you have any problems or questions, please don’t hesitate to let us know. Travel made easy: perfect for your next cold weather getaway, our quarter zip thermal can be worn as a mid or outer layer without weighing you down. Includes: 1 – merino wool women’s half-zip baselayer sweater.

Everyday function: whether you’re staying active outdoors or you’re curling up by the fire, our heavyweight 1/2 zip pullover offers versatile style. Regulate body temperature: breathable and fast-drying, our thermal base layer is ideal for running, hiking and your favorite winter sports. With a form-fitting design and raglan sleeves, you’ll enjoy freedom of movement with zero chaffing. Essential for cold to freezing temps, you can zip up for added warmth or zip down for a bit of fresh air. Material: 19.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Part NumberMO WOMEN-TZIP400-S-BLK

6. SHEEP RUN

#ad

Large, Men 100% Merino Wool Base Layer Thermal Underwear 400g Tops Bottoms Set … Gray

#ad
SHEEP RUN #ad - Select one size up as usual. It's great for both breathability and warmth as base layer Or Second Layer Set. This item is made in china and ship from China via ePacket. Available in men's sizes: s to xXL, but it's Chinese's size. If you don't know how to select size, tell me for assistance feel free. Please see the size chart in Product Description, Don't Bleach or wash in warm water. It will take about 10 days.
BrandSHEEP RUN #ad
Height2.76 Inches
Length13.78 Inches
Weight1.32 Pounds
Width11.81 Inches

7. MERIWOOL

#ad

MERIWOOL Mens Form Fitting Base Layer 100% Merino Wool Heavyweight 320g Half Zip Sweater for Men Black

#ad
MERIWOOL #ad - This top's new reflective strip detailing along the front zipper, working, hiking, mountaineering, skiing, playing winter sports, and back improve visibility and safety in low light conditions. Multipurpose comfort & convenience: a blend of warmth and modern design achieve the perfect balance of comfort for optimal performance.

Enjoy easier arm movement and increased mobility with raglan sleeves. Package includes: 1 - men’s 320g/m² merino wool half zip thermal turtleneck top – Black / M - Take note of sizing guide, these are sized to fit tight. Soft & breathable: an ideal cold weather companion, our superfine 18. 5 micron 100% all-natural merino wool ensures all day comfort without the itch. A half-zip design allows this top to be worn as a lightweight thermal base layer, letting you seal up for extra warmth or open up to cool down without overheating. Exceptional customer care: if your meriwool men’s half zip mock neck pullover sweater doesn’t perform to your satisfaction, or replacement.

Includes a 1-year limited manufacturer’s warranty, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, exchange, which covers manufacturing and material defects. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. This extra warm mid-layer sweater features added thumb slits for extra warmth and mobility. Soft and flexible, our fabric moves with you and quickly recovers its original size and shape.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Height50 Centimeters
Length100 Centimeters
Weight100 Kilograms
Width100 Centimeters

8. MERIWOOL

#ad

MERIWOOL Mens Base Layer 100% Merino Wool Thermal Pants Black

#ad
MERIWOOL #ad - Breathable: keeping you cool in summer and warm in winter, playing sports, working, meriwool’s 250g/m2 weight interlock-knit Merino wool can be used as a base layer or mid-layer, hiking, hunting, but won’t weigh you down. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers.

Comfortable & convenient: Quick-drying pants feature a loop for hang drying while camping, skiing, or partaking in any outdoors activity. Package includes: 1 - men’s 250g/m² merino wool thermal leggings. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Exceptional customer care: if your meriwool men’s leggings don’t perform to your satisfaction, exchange, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, or replacement.

For best results: hand wash and lay flat to dry. Super soft: 100% all natural superfine 18. 5-micron merino wool ensures comfort all day long – no itch! easy CARE: Your thermal pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so it’s ready when you are for your next adventure. Men’s size options: XS to 3XL. Includes a 1-year limited manufacturer’s warranty, which covers manufacturing and material defects.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Weight0.66 Pounds
Part NumberEM MW-M-LEG250-M-BLK

9. MERIWOOL

#ad

MERIWOOL Mens Base Layer, 100% Merino Wool Midweight Long Sleeve Thermal Shirt Black

#ad
MERIWOOL #ad - Super soft: 100% all natural superfine 18. 5-micron merino wool ensures comfort all day – no itch! eaSY CARE: Mid-weight long sleeve crew top shirt is machine-washable and dryer-safe, so it’s ready when you are for your next adventure. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers.

Men’s size options: XS to 3XL. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Package includes: 1 - men’s 250g/m² merino wool thermal crewneck top. Easy care: mid-weight long sleeve crew top shirt is machine-washable on cold setting and safe to tumble dry on low heat, 250g/m2 weight interlock-knit Merino wool can be used as a base layer or mid-layer, so it’s ready when you are for your next adventure.

Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Breathable: keeping you cool in summer and warm in winter, but won’t weigh you down. Exceptional customer care: if your meriwool men’s crew top doesn’t perform to your satisfaction, exchange, or replacement. Includes a 1-year limited manufacturer’s warranty, return it to us within 30 DAYS along with proof of purchase for a hassle-free refund,  which covers manufacturing and material defects. Washer/dryer safe.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Part NumberLYSB01N1IVTGC-SPRTSEQIP