10 Best Men’s Thermal Underwear: Ultra Warm & Light

Daniel Bishop
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Keeping warm is of paramount importance in the cold winter months. However, no one wants to wear an uncomfortable coat or bulky sweater. Thankfully, there are lots of options for warm but thin winter wear.

Many brands have designed thin and lightweight winter jackets that keep you warm while offering you mobility and flexibility. One of the best ways to ensure that you keep warm during the winter is to wear light thermal underwear. Men’s thermals are the perfect layering item for cold weather outfits. Not only is this type of underwear is thin and barely noticeable, it is also incredibly warm and easy to put on or remove.

NameCategoryProduct
Minus33 Merino Wool 706 Kancamagus Men's Midweight BottomBest OverallMinus33 Merino Wool 706 Kancamagus Men's Midweight Bottom
ColdPruf Men's Basic Dual Layer BottomBudget PickColdPruf Men's Basic Dual Layer Bottom
Smartwool Men's Merino 150 Baselayer Long SleeveUpgrade PickSmartwool Men's Merino 150 Baselayer Long Sleeve

1. Minus33 Merino Wool 706 Kancamagus Men's Midweight Bottom

Our rating: 9 / 10

Minus33 Merino Wool 706 Kancamagus Men's Midweight Bottom

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Pros:

  • Ultra light-weight material
  • Crew length that can be worn as pants by itself
  • The material is soft and non-itchy
  • The manufacturer offers excellent after-sales service
  • Their designs are stylish and won’t make you look like a hayseed

Cons:

  • Pricier than other less quality options
  • Not very durable
  • Rayon 100% so you might not be able to wear these on a hike to up a mountain

Minus33 products are incredibly popular with campers and hikers. Their brightly colored products are bold and graphic. Yet, they’re warm, comfortable and multi-functional. The 600 and 700 series are roomy and the 100% Merino wool fabric material feels soft and non-itchy. These are definitely a technical product.

The shape and design of the pants allows the leg openings to be very wide and flowing. The mid-weight material material provides body warming insulation properties and much needed moisture management, keeping users warm and dry. Merino wool is naturally wicking and odor resistant. This makes it an excellent choice for all different types of users.

2. Duofold Men's Mid Weight Double-Layer Thermal Union Suit

Our rating: 9 / 10

Duofold Men's Mid Weight Double-Layer Thermal Union Suit

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Pros:

  • Highly durable, but comfortable
  • Many considered it the best thermal underwear for cold weather
  • Two layers are sufficient to keep the warmth in and the cold out
  • Ideal for both home and office use

When it comes to comfort and durability the Duofold is the clear winner. The two-layer design is enough to keep you warm even in below freezing temperatures. The material is also very durable and will last you a long time if you take proper care of it.

The Duofold has plenty of sizing options, so you should be able to find one that fits perfectly for you.

If you do prefer to go up a size, you can do so without worrying about the thermal underwear exposing your body to the cold outside. The extra layer is just enough to keep you warm.

3. Carhartt Men's Force Midweight Classic Thermal Base Layer Pant

Our rating: 8 / 10

Carhartt Men's Force Midweight Classic Thermal Base Layer Pant

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Pros:

  • Thermal fabric helps regulate body temperature
  • Features Action-Textured T400 material which is resistant to abrasion
  • Made in the USA ensuring the quality of the garment and workmanship
  • The double-reinforced knees
  • 65% Polyester/35% Rayon blend
  • Relaxed Fit
  • Machine Washable
  • Men’s sizes S-5X (6-XL)
  • Come in various colors: Deep Steel Blue (DTB), Black, Navy, Charcoal, and Sand.

Cons:

  • The cost
  • Thermal qualities diminish after only a few washes

Combining style with functionality, these Carhartt Force Midweight thermal overalls for men are a USA made design.

The Carhartt Force is designed for a fashionable style and a warmth that can withstand the harshest of elements.

Whether you are a fishermen, hunter, woodsman, or general outdoorsman, you are sure to benefit from having these Carhartt Force thermal overalls in your tool kit.

4. Hanes Men's Waffle Knit Thermal Pant

Our rating: 8 / 10

Hanes Men's Waffle Knit Thermal Pant

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Pros:

  • 100% Microfine cotton Polyester fabric for soft, breathable heat and climate control
  • Back leg panel adjustment for a great fit from size S to 2XL
  • Sweatshirt waistband provides warmth and comfort
  • Tag-free neck label and double-needle hem for enhanced durability
  • Flat lock stitching prevents chafing and irritation for comfortable fit
  • Available in four colors: black, grey, navy, and heather grey
  • Perfect to wear for cold weather adventures like hiking, skiing, and snowboarding

Cons:

  • Some color fading may occur over time
  • Might feel a little stiff at first but loosens up quickly

(3 Pack)

Hanes men’s thermal underwear are available in packs of three so you don’t have to worry about wearing the same pair over and over. They come in four different sizes to ensure you get a great fit. The 100 percent microfine cotton polyester fabric is both comfortable and light weight.

5. Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set

Our rating: 8 / 10

Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set

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Pros:

  • Ultra soft thermal fabric
  • Thick and extra warm thermal material is eco-friendly
  • Repels heat and keeps you stay cozy warm
  • Ultra soft thermal fabric, makes you feel comfortable all day long, no need to change
  • Designed with side zipper, you can easily wear it.
  • The bottom of thermal underwear is flat, comfortable and stays up all day long.

Cons:

  • There is no size chart given.
  • You have to fold the pants at the ankle for it to fit well.

Your winter season is about to start, and you know you need something to protect your legs from the cold. As there are many heated blankets for the beds, but this product is for men and it is a thick thermal underwear. This product has a very high thermal protection and it has double layers as thermal pants. This product is a set of thermal long underwear, which comes with a thermal vest and thermal pants. This product comes with six different sizes and if you are looking to buy two, you can find the best combination of size for you here.

You can wear it easily with the help of the zipper side, and you can take this product in hand instantly. The product is very soft, and due to this, it will keep you comfortable and warm. The material is very soft and it will not irritate your skin or cause any allergies.

6. Rocky Thermal Underwear

Our rating: 8 / 10

Rocky Thermal Underwear

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Pros:

  • Warmth without the bulk
  • Breathable and soft construction
  • Tough enough to be worn as an outer layer
  • Maintains body temperature even in low temperatures
  • Reinforced stitching for added durability
  • A mid-range price
  • Easy to care for – machine washable
  • Perfect for use as an outer layer – additional warmth without the bulkiness

(Sizes Small to 4XL)

Great thermal underwear, comfortable to wear and maintains warmth. These long underwear for men retain heat well.

These Rocky thermal underwear are suitable for casual wear around the house. They are also suitable for wearing under clothes to add extra warmth.

7. Smartwool Men's Merino 150 Baselayer Long Sleeve

Our rating: 8 / 10

Smartwool Men's Merino 150 Baselayer Long Sleeve

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Pros:

  • Quality product
  • Abdominal warmth and softness
  • Sweat absorbent without the stink, stank, or stench
  • It is hard to find a better value thermal for fitness
  • Natural selection of Merino and special knitting methods used to make this give you maximum warmth with breathability.
  • The "anti-microbial" merino wool is a natural barrier, which prevents odor-causing bacteria and it also helps you stay uber-comfy beyond the gym.
  • This is one of the best to be used as a baselayer
  • Available in many designs and colors

Cons:

  • It is a bit pricey but you can place an order with discount coupons.
  • This product, from Smartwool, is a great looking thermal that is also very long-lasting.
  • One interesting thing about merino is that it regulates your body temperature – so it’s best to wear merino when you’re a bit overheated – it’ll then bring your body back down to normal without any extra effort.
  • The Smartwool Men's Merino 150 Baselayer Long Sleeve is another thermal that can work both indoors and outdoors.

8. TSLA Men's Thermal Underwear Set

Our rating: 8 / 10

TSLA Men's Thermal Underwear Set

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Pros:

  • Warmth and Comfort: the Thermal Underwear pants and top are extremely soft and comfortable, but they still provide the warmth necessary for the winter months
  • Good design: the pants come with side pockets which can fit any standard size smartphone
  • Long and thin enough: the Thermal Underwear pants are long enough to keep you covered up, and they fit slim enough to not be baggy
  • Wide variety: the sellers offer a wide variety of sizes and colors to choose from
  • Fair price: you get a lot of value for your money, especially when taking into account the low price of this product

Cons:

  • The Thermal Underwear pants are not very breathable, so you will sweat when the temperature rises
  • The thermal underwear set will not keep you warm during extremely cold temperatures

Unisex.

This thermals set from TSLA is as basic as it gets: it does its job well, but it doesn’t attempt to overwhelm you with features or anything fancy. It’s suitable for every day wearing during winter, but it won’t work when temperatures dip low enough.

This thermal set comes in a variety of sizes and colors: from XXL to XS, you can find a great fit for you.

9. ColdPruf Men's Basic Dual Layer Bottom

Our rating: 8 / 10

ColdPruf Men's Basic Dual Layer Bottom

Check Price on Amazon

Pros:

  • Dual-layer compression technology
  • Seamless
  • Body heat isolation
  • Lightweight feel
  • Moisture-wicking fabric
  • Good fit
  • Cozy, warm, and soft
  • Affordable price

The ColdPruf Men’s Basic is a fine set of thermal underwear. The dual-layer construction allows this underwear to keep you warmer than your average thermal underwear.

The design of these underwear are simple. They come in a classic two-color scheme which makes them look identical to regular boxer briefs. They also come in two different sizes: average and large.

Their tagless design is a major plus. Not only is it more comfortable but also saves you from those annoying itchy labels that other underwear have. Once you try these underwear on once, you’ll never want to wear anything else. They are incredibly comfortable.

10. Minus33 Merino Wool 706 Kancamagus Men's Midweight Bottom

Our rating: 7 / 10

Minus33 Merino Wool 706 Kancamagus Men's Midweight Bottom

Check Price on Amazon

Pros:

  • Ultra light-weight material
  • Crew length that can be worn as pants by itself
  • The material is soft and non-itchy
  • The manufacturer offers excellent after-sales service
  • Their designs are stylish and won’t make you look like a hayseed

Cons:

  • Pricier than other less quality options
  • Not very durable
  • Rayon 100% so you might not be able to wear these on a hike to up a mountain

Minus33 products are incredibly popular with campers and hikers. Their brightly colored products are bold and graphic. Yet, they’re warm, comfortable and multi-functional. The 600 and 700 series are roomy and the 100% Merino wool fabric material feels soft and non-itchy. These are definitely a technical product.

The shape and design of the pants allows the leg openings to be very wide and flowing. The mid-weight material material provides body warming insulation properties and much needed moisture management, keeping users warm and dry. Merino wool is naturally wicking and odor resistant. This makes it an excellent choice for all different types of users.

Frequently Asked Questions (FAQ)

What is the best thermal underwear for men?

Thermal underwear is super-comfortable under any clothes, especially with the addition of some great-smelling cologne. It helps protect you from shivering, keeps you warm, and most importantly, it keeps your backside warm. This makes it great for when you want to look great but are outside in cold weather. Thermal underwear also makes the best base layers for ski trips, hiking expeditions and, of course, snowy winter walks. Thermal underwear, in fact, is also a great option for traveling for its ability to help absorb moisture.

Now that the weather has turned cold and winter is already showing its teeth, we have composed a list of the 10 Most comfortable thermal underwear for men.

What is the best thermal underwear?

Thermal underwear is the perfect gift for the men in your life. We have researched the best brands in this category and hand selected our favorites for you.

What is the best thermal underwear for cold weather?

Underwear may not be the first attire that comes to mind when thinking about cool weather attire. Still, depending on your body type and the kind of clothes you prefer to wear during colder weather, you may need some quality thermal underwear. For many people, the best thermal underwear is made of merino wool or silk. Since these are long-lasting materials, you can use them for years to come. Merino wool thermal underwear is more absorbent and can provide some welcome comfort to your skin. If you find yourself looking for the best men’s thermal underwear for cold weather, these are two good options.

How do I choose a thermal wear?

Thermal wear is an important piece of clothing for everyone. If you live in a place with very cold winters, you need to protect your body from severe cold and heat. That’s why you are looking for thermal wear that is warm yet lightweight. This is best achieved with thermal wear made from polar fleece, a material with which I am most familiar.

The benefits of polar fleece include softness, lightweight, absorbency, humidity resistance, and anti-odor properties. So not only is it very warm, it stays dry without sweating into your skin. You can wear polar fleece garments from head to toe, or use it as a layer in your winter clothing.

Here are what I consider to be the 10 best thermal underwear for all-around wear in cold and warm weather.

Conclusion

If you have an upcoming outdoor adventure, or you just want to be prepared for sudden cold spells, this buying guide will help you make a decision that you won’t regret. This guide will teach you all about the different types of thermal underwear available, and will give you insights into which ones offer more value for their price, and ultimately, which ones are the best value for what you need.

Our Recommendation

NameCategoryProduct
Minus33 Merino Wool 706 Kancamagus Men's Midweight BottomBest OverallMinus33 Merino Wool 706 Kancamagus Men's Midweight Bottom
ColdPruf Men's Basic Dual Layer BottomBudget PickColdPruf Men's Basic Dual Layer Bottom
Smartwool Men's Merino 150 Baselayer Long SleeveUpgrade PickSmartwool Men's Merino 150 Baselayer Long Sleeve