Best Thermal Bottoms 2026

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Last Updated - 03.02.2026

Best Choice

01

MERIWOOL

MERIWOOL Men's Base Layer 100% Merino Wool Heavyweight 400 g Thermal Pants, Charcoal Gray

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9.9

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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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, hiking, hunting, working, playing sports, skiing, or partaking in any outdoors activity.
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: S to 2XL.
Package Includes: 1 - Men's 400g/m² Merino Wool Thermal Leggings
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

95,43 €
Value for Money

02

Smartwool

SmartWool Men's Merino 250 Baselayer Bottom Boxed Thermal Bottoms

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29% Off
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Smartwool THERMAL LEGGINGS The soft athletic pants for men conform to body contours providing a comfortable, wide waistband with merino trim
Maximum comfort: the lightweight merino jersey fabric is made from recycled nylon at the core and offers durability and comfort thanks to ZQ certified merino wool
High-quality ski or sports underwear for men: the thermal leggings impress with flatlock seams, interlock knit and minimised friction
Go Far. Feel Good. The merino wool from Smartwool complements any winter wardrobe with a cosy thermal layer system and ensures the highest level of comfort all day long
For any season: the ultra-soft merino wool regulates temperature, is breathable and naturally prevents odours

81,42 € 114,95 €(29% Off off)
03

orbiz

Mens Thermal Underwear Long Johns Ultra Hot Brushed Inner Ultra Soft Pants Leggings Pack of 3, black

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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100% Satisfaction Guarantee Thermal trousers men's warmth are the best expression of love in cold winter. The long underpants for men is the first gift for Christmas, New Year, Birthday and Valentine's Day. If you have any problem with the thermal function for men, please make sure to connect us
WARM & COMFORTABLE - Men's thermal pajamas snug like a second skin, so you don't have to deal with excess fabric bundles and give you much more freedom to enjoy the outdoors. It is the best thermal clothing for winter.
PREMIUM COMFORT The 3 pack thermal underwear set for men is made of 50% cotton and 50% polyester blends, which feels ultra soft and comfortable, provides breathability, allowing odors to escape and provide a comfortable feel in cold weather.
HIGHLY FLEXIBLE The thermal underwear for men features 4 way stretch and compression fabric for a more flexible fit to your body without any tied feeling, allowing you to move freely. Meanwhile, the men's trousers keep warm better without losing body heat.
HEAT RETAINMENT When it comes to warmth and everyday wear, these men's thermal leggings are designed specifically for you to stay protected from the cold. The base layer wicks away moisture to maintain a comfortable temperature.

24,95 €
04

Ouruikia

Ouruikia Men's Thermal Underwear Long Underwear Warm Underwear with Cotton, black

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17% Off
9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Warmth - Thermal underwear regulates your body temperature, keeping you warm and dry. The perfect pair of these thermos fabrics will keep you warm and wick away sweat.
TIGHT FIT - Snug fitting thermal underwear as a second skin and creates an insulating layer between body and fabric. This thermal underwear captures the heat generated by the body and increases comfort. This prevents cold air from entering your body when you participate in outdoor activities.
Special Crotch & Soft Reinforced Openings - It feels soft on the inside and smooth on the outside, allowing it to slide against your pants instead of creating friction, reducing the potential for chafing. It also features a special crotch area that gives the wearer a much appreciated support without choking themselves. It has soft reinforced openings for the legs that prevent riding up.
SOFT FABRICS FOR THERMAL UNDERWEAR 95% Cotton, 5% Spandex, provides a luxuriously soft texture without adding bulk. This fabric cleverly balances your body temperature and provides great moisture management no matter the conditions.
SEPARATE THERMAL PANTS - It is designed to give you more space. This extra space is perfect for the well-equipped man who is less squashed and much more comfortable than with a regular bag. Extra space also helps reduce sticking and gives a little more space for air circulation, reduces temperature and therefore sweating. You do not need to wear boxer shorts inside.

14,98 € 17,99 €(17% Off off)
05

Fruit of the Loom

Fruit of the Loom Men's Pyjama Bottoms, Greystone Heather, M

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9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Traditional full length thermal pants made from cotton and recycled polyester.
Soft mini waffle fabric long johns.
Reinforced flat seam construction.
Provides insulation and warmth in cold to moderately cold conditions.
Moisture-wicking and quick-drying material.

20,49 €
06

CL convallaria

CL convallaria Men's Thermal Pants 1/2/4 Pack Fleece Lined Thermal Bottom Sporty Base Layer Cold Weather Gear

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25% Off
9.1

Excellent

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Super warm: The thermal underwear men's is made of fleece-lined fabric with high heat retention and wind protection function. The high-density microfibers can lock in the heat in your body and keep you warm all day long

14,99 € 19,99 €(25% Off off)
07

baleaf

baleaf Women's Thermal Yoga Trousers High Waist Flared Leggings Winter Fleece Lined Thermal Trousers Drawstring Thermal Leggings Bootcut Bell Bottom Warm Jogging Bottoms with Pockets, black, L

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46% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

V back shape bootcut design: V-back seams like cute hearts to perfectly contour your curves and make your shape streamlined. Slightly flared trouser shape visually slims the silhouette and adapts to any body type.
FOR WINTER OCCASIONS Our thermal pants are the perfect everyday wear in winter, suitable for yoga, hiking, business casual, running, dancing, party, travel, any outdoor activities or relaxing at home.
Drawstring high waist and without front seam: these yoga trousers have a wide and 4 inch waistband with drawstring, providing gentle compression. No front seam (no camel depth) for movement without restriction. The high-waisted design has an excellent slimming effect, which makes these flared trousers fit closer to the body and do not slip down easily.
Do you feel the cold? Put on these fleece lined trousers. These high waist yoga trousers with pockets with white fleece lining keep you super warm below -10~4°C, the fabric is on the outside to better protect you from wind on a snowy day. Moistureable material can help the body remove sweat quickly, so you can choose outdoor and hiking exercises to stay dry.
4 FUNCTIONAL POCKETS Two side pockets and a side secure zipper pocket give you enough space to keep your phone during exercise without worrying about it falling out. 1 hidden back waist zip pocket lets you put some keys, hair ties in it. Allows you to carry more personal items.

19,99 € 36,99 €(46% Off off)
08

Trespass

Trespass Women's Yomp360 1 X Base Layer Pants, Black X, Large

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quick drying properties
Moisture wicking
Flat seams for comfort
Elastic waistband for better fit
Deep cuffs

24,01 €
09

HICARER

6 Pcs Long Johns Bottoms Thermal Underwear Pants Men's Thermal Pants Thermal Bottoms Men Long Underwear Leggings for Winter, black/grey

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

SOFT & COMFORTABLE The black gray and navy long underwear is made of cotton, dark gray thermal underwear is made of 20% polyester and 80% cotton. These materials are soft and comfortable, durable and strong, which gives you a nice wearing experience
Outdoor activities accessories: the thermal pants are breathable and practical to keep your feet warm in cold days, suitable for various outdoor activities; You can use them for snowboarding, skiing, running, dog walking and so on, you can also wear them as pajama pants for warmth and comfort
ESSENTIAL FOR WINTER Our underpants for men are made of double layer fabric at the foot opening and button placket, with ribbed elastic cuffs on the foot cuffs. These trousers can completely protect your legs from frostbite in the cold winter, with windproof and warm effect
CHOOSE THE SIZE AS YOU NEED Our mens thermal underwear for men comes in 3 sizes to choose from, including L, XL and XXL; The pants features nice sweat absorption and certain elasticity, allowing you to move freely while walking, jumping and running without feeling too tight or limited. Please refer to the size details in the picture before ordering
Appropriate to meet your needs: you will receive 6 pairs of men's thermal pants in black gray, rich in quantity, enough to meet your wearing and replacement needs, bringing you warmth in cold winter

53,13 €
10

reshmena

reshmena® Men's Thermal Underwear Tops & Bottoms Men's Full Sleeve Top Vest & Men's Thermal Long Underpants Men's Winter Top and Thermal Long John, White Long Sleeve Top

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8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

SIZES & COLORS This men's thermal set is available in size S Bust = (88-89cm), S Waist = (78-81cm), M Bust = (97-102cm), M Waist = (84-89cm), M Waist = (84-89cm) 83 cm. 8-88.9 cm), L Bust = 104-109 cm, L Waist = 92-99 cm, XL Bust = 112-117 cm, XL Waist = (102-117 cm). 07 cm 01.6-106.7 cm), 2XL Bust = (120-125 cm), 2XL Waist = (110-115 cm). Colours: black, white, blue and anthracite.

17,66 €