Best Long Underwear for Men

10 Best Long Underwear for Men in 2025: Top Thermal Options for Cold Weather

Whether you need thermal bottoms for outdoor activities or moisture-wicking underwear for daily wear, we have you covered. Read on to discover the best long underwear options to keep you warm this winter.

1. Realtree Men's Heavyweight Cotton Polyester Thermal Long Johns Underwear Bottom

Realtree Men's Heavyweight Cotton Polyester Thermal Long Johns Underwear Bottom, Ivory, Large

The Realtree Men's Heavyweight Cotton Polyester Thermal Long Johns Underwear Bottom in Ivory, Large is ideal for outdoor enthusiasts and individuals who work in cold environments. It's perfect for anyone needing reliable warmth and comfort during winter activities such as hunting, hiking, or working outdoors.

Pros:

  • Provides excellent warmth with its heavyweight cotton polyester blend.
  • Durable material ensures long-lasting wear.
  • Comfortable fit suitable for extended use.

Cons:

  • The ivory color may show dirt more easily.
  • Limited color options available.

The Realtree Men's Heavyweight Cotton Polyester Thermal Long Johns Underwear Bottom stands out due to its blend of cotton and polyester, providing superior warmth. The heavyweight fabric is designed to keep you cozy even in the harshest conditions, making it an excellent choice for winter activities. Furthermore, the durable construction ensures that these long johns will last through many cold seasons, offering great value for your investment.

Another significant benefit is the comfort these thermals provide. The combination of materials not only keeps you warm but also feels soft against the skin, reducing the risk of irritation during prolonged wear. However, the ivory color might not be the best choice for those concerned with maintaining a clean appearance, and the limited color options may not suit everyone's taste. Despite these minor drawbacks, the overall functionality and comfort make these thermal long johns a reliable choice for cold-weather activities.

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2. Fruit Of The Loom Men's Recycled Premium Waffle Thermal Underwear Long Johns Bottom

Fruit of the Loom Men's Recycled Premium Waffle Thermal Underwear Long Johns Bottom (1, 2, 3, and 4 Packs), Black, Medium

The Fruit of the Loom Men's Recycled Premium Waffle Thermal Underwear Long Johns Bottom is ideal for individuals seeking comfort and warmth during the colder months. Whether you're an outdoor enthusiast, someone who works in cold environments, or simply looking for a comfortable and eco-friendly option for home use, this product is tailored to meet those needs.

Pros:

  • Made from recycled materials which is environmentally friendly.
  • Waffle knit fabric provides excellent insulation.
  • Moisture-wicking properties keep you dry.
  • Soft and comfortable fit.
  • Available in multiple pack sizes for convenience.

Cons:

  • Limited color options (only available in black).
  • Sizing may not be suitable for all body types.

The Fruit of the Loom Men's Recycled Premium Waffle Thermal Underwear Long Johns Bottom stands out with its combination of eco-friendly materials and practical design. The waffle knit fabric is specifically crafted to trap body heat, making it an excellent choice for maintaining warmth. Additionally, its moisture-wicking properties ensure that the skin remains dry, reducing discomfort during extended wear.

Another significant benefit is the soft and comfortable fit that Fruit of the Loom is known for. This thermal underwear is not only functional but also offers a snug, cozy feel. Its availability in multiple pack sizes adds to the convenience, allowing users to purchase according to their needs. However, the limited color option and potential sizing issues are minor drawbacks compared to the overall performance and benefits this product offers.

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3. Thermajohn Long Johns Thermal Underwear For Men Fleece Lined Base Layer Set For Cold Weather

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (Small, Black)

Thermajohn Long Johns Thermal Underwear for Men is the perfect choice for those who frequently face cold weather conditions. Whether you are an outdoor worker, enjoy winter sports, or simply need an extra layer of warmth during chilly days, this fleece lined base layer set is designed to keep you comfortable and warm. It is ideal for men who value both functionality and comfort in their thermal wear.

Pros:

  • Made from high-quality materials that provide excellent insulation.
  • Fleece lined interior offers additional warmth and comfort.
  • Lightweight and slim-fit design ensures it can be worn under other clothes without bulkiness.
  • Breathable fabric helps to wick away moisture, keeping you dry.
  • Available in a classic black color which pairs well with any outfit.

Cons:

  • May not be suitable for extremely high-intensity activities due to its insulating properties.
  • Sizing can be tricky; some users may need to size up for a more comfortable fit.

The Thermajohn Long Johns Thermal Underwear set is engineered to deliver maximum warmth without compromising on comfort. The fleece lining adds a cozy layer against the skin, making it perfect for low to moderate activities in cold climates. Additionally, the lightweight design ensures that it can be easily worn underneath other clothing without feeling cumbersome, allowing for a greater range of motion and flexibility.

Another standout feature is the breathability of the fabric, which effectively wicks moisture away from the body. This helps in keeping you dry and comfortable throughout the day, even when engaging in light physical activities. The classic black color offers a versatile look that can easily be paired with any outerwear, making it a practical addition to any winter wardrobe.

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4. Weerti Thermal Underwear For Men Long Johns

WEERTI Thermal Underwear for Men Long Johns with Fleece Lined, Base Layer Men Cold Weather Top Bottom Black

The WEERTI Thermal Underwear for Men Long Johns with Fleece Lined is perfect for those who engage in outdoor activities during the winter season or work in cold environments. If you are someone who enjoys hiking, skiing, or any other winter sport, or if you need reliable thermal wear for your job, this product is designed for you.

Pros:

  • Made from high-quality materials that ensure durability and warmth.
  • Fleece lining provides extra insulation and comfort.
  • The black color is versatile and can be worn under any outfit.

Cons:

  • Limited color options; only available in black.
  • Sizing may run small, so it is recommended to check the size chart before purchasing.

The WEERTI Thermal Underwear features a fleece lining that provides exceptional warmth, making it ideal for extremely cold weather. The high-quality material used in its construction ensures that it is both durable and comfortable to wear. Additionally, the black color makes it a versatile choice that can easily be paired with other clothing items.

Another notable feature is the base layer design which allows for easy layering without adding bulk. This makes it perfect for wearing under your regular clothes while maintaining a sleek appearance. The dimensions are thoughtfully designed to provide a snug fit, ensuring that the thermal underwear effectively retains body heat.

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5. Hanes Mens 3-pack Comfort Flex Fit Ultra Soft Stretch Brief

Hanes Mens 3-pack Comfort Flex Fit Ultra Soft Stretch Brief, Available In Regular And Long Leg Boxer, Gray/Blue- Long Leg - 3 Pack, X-Large US

The Hanes Mens 3-pack Comfort Flex Fit Ultra Soft Stretch Brief is ideal for men who prioritize comfort and flexibility in their underwear. Whether you are an athlete, someone with an active lifestyle, or simply looking for daily comfort, this product is perfect for you. The long leg design ensures extra coverage and support, making it suitable for those who prefer more extended briefs.

Pros:

  • Ultra Soft Stretch fabric for maximum comfort
  • Comfort Flex Fit that adapts to your body shape
  • Available in Regular and Long Leg options for personalized fit
  • Hanes brand guarantees quality and durability

Cons:

  • Limited color options (only Gray/Blue)
  • May be slightly more expensive compared to non-branded briefs

The Hanes Mens 3-pack Comfort Flex Fit Ultra Soft Stretch Brief features an ultra-soft fabric that stretches to fit your body perfectly. This ensures maximum comfort throughout the day, whether you are exercising or at work. The Comfort Flex Fit technology allows the briefs to move with you, providing a snug yet flexible fit.

Available in both Regular and Long Leg boxer briefs, this pack caters to individual preferences for leg coverage. The Gray/Blue color combination adds a touch of style, while the Hanes brand assures high quality and durability. With dimensions of Height: 1.0 inches, Width: 8.0 inches, Length: 13.0 inches, and Weight: 0.65 Pounds, these briefs are designed to offer both comfort and practicality.

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6. Under Armour Men's Heatgear Armour Leggings

Under Armour Men's HeatGear Armour Leggings , Black (001)/Pitch Gray, Large

The Under Armour Men's HeatGear Armour Leggings are ideal for athletes and fitness enthusiasts who are looking for high-performance gear that provides comfort and support during intense workouts. Whether you're a runner, cyclist, or gym-goer, these leggings are designed to enhance your performance and keep you cool and dry.

Pros:

  • Made from high-quality materials
  • Provides excellent moisture-wicking capabilities
  • Lightweight and durable
  • Comfortable fit with great mobility
  • Stylish design suitable for various activities

Cons:

  • May be pricey compared to other brands
  • Limited color options

The Under Armour Men's HeatGear Armour Leggings come with several features that make them stand out. The high-quality materials ensure durability and longevity, making them a worthwhile investment for any athlete. The moisture-wicking capabilities keep you dry and comfortable, even during the most intense workouts. Additionally, the lightweight nature of the leggings allows for ease of movement, enabling you to perform at your best without any restrictions.

Comfort is a key benefit of these leggings. The comfortable fit ensures that you can wear them for extended periods without any discomfort. The mobility offered by the design means you can move freely, whether you're lifting weights or running a marathon. The stylish design is an added bonus, making you look good while you train hard. However, it's worth noting that these leggings may be pricey for some, and the limited color options might not appeal to everyone.

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7. Thermajohn Long Johns For Men

Thermajohn Long Johns for Men, Thermal Underwear for Men Long Underwear Mens Leggings Thermal Pants Cold Weather Bottoms (Black, Large)

Thermajohn Long Johns for Men are ideal for those who spend a lot of time outdoors in cold weather, whether for work, sports, or recreation. If you are someone who needs extra warmth and comfort during the winter months, these thermal underwear pants are a great choice.

Pros:

  • Made from high-quality materials
  • Excellent insulation to keep you warm
  • Comfortable fit that moves with you
  • Versatile for various outdoor activities

Cons:

  • Limited color options
  • May not fit well for all body types

The Thermajohn Long Johns for Men are designed to provide maximum warmth and comfort during cold weather. The high-quality materials ensure that you stay warm even in the harshest conditions, making them perfect for outdoor activities like skiing, snowboarding, or hiking. The excellent insulation traps body heat, allowing you to stay comfortable without feeling bulky or restricted.

Another great feature of these thermal pants is their comfortable fit. They are designed to move with your body, providing flexibility and support without being too tight. This makes them ideal for active individuals who need reliable thermal wear that won't hinder their movements. Additionally, their versatility means they can be worn for various purposes, whether you're working outside, playing sports, or simply need an extra layer of warmth during your daily commute.

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8. Fruit Of The Loom Men's Recycled Waffle Thermal Underwear Set

Fruit of the Loom Men's Recycled Waffle Thermal Underwear Set (Top and Bottom), Greystone Heather, Medium

Fruit of the Loom Men's Recycled Waffle Thermal Underwear Set

The Fruit of the Loom Men's Recycled Waffle Thermal Underwear Set is an excellent choice for environmentally conscious individuals looking to stay warm during the colder months. This set is ideal for men who want comfort, durability, and eco-friendliness in their thermal wear. Whether you're an outdoor enthusiast, someone who works in cold environments, or simply need an extra layer of warmth for everyday wear, this thermal set is designed to meet your needs.

Pros:

  • Eco-friendly materials
  • Durable and long-lasting
  • Provides excellent warmth
  • Comfortable fit
  • Lightweight design

Cons:

  • Limited color options
  • May not fit well for all body types

The Fruit of the Loom Men's Recycled Waffle Thermal Underwear Set features a Greystone Heather color that is both stylish and versatile. Its waffle knit fabric traps heat effectively, making it an excellent base layer for cold weather. The recycled materials used in its construction not only reduce environmental impact but also provide a soft and comfortable feel against the skin.

One of the standout features of this thermal set is its durability. Designed to withstand multiple washes without losing its shape or effectiveness, it offers great value for money. The set includes both a top and bottom, ensuring full-body warmth. Additionally, the lightweight design ensures that it can be worn comfortably under regular clothing without feeling bulky.

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9. Fruit Of The Loom Men's Coolzone Boxer Briefs

FRUIT OF THE LOOM Men's Coolzone Boxer Briefs, Moisture Wicking & Breathable, Multipacks, Long Leg-7 Pack-Assorted Colors, Large

If you are someone who values comfort and durability in underwear, then the FRUIT OF THE LOOM Men's Coolzone Boxer Briefs are the perfect choice for you. Ideal for active men who need moisture-wicking and breathable fabric to keep them cool throughout the day, these boxer briefs come in multipacks and feature a long leg design for added coverage.

Pros:

  • Moisture-wicking fabric keeps you dry and comfortable.
  • Breathable material prevents overheating.
  • Multipack offers great value for money.
  • Long leg design provides extra coverage.
  • Assorted colors add variety to your wardrobe.

Cons:

  • Some users may find the long leg design too lengthy.
  • Assorted colors might not appeal to everyone.

The FRUIT OF THE LOOM Men's Coolzone Boxer Briefs are designed to offer maximum comfort with their moisture-wicking and breathable fabric. This makes them ideal for active men who need reliable underwear that can keep up with their lifestyle. The multipacks ensure you always have a fresh pair ready, while the long leg design provides added coverage and prevents chafing, making them suitable for extended wear.

Additionally, the assorted colors in the pack allow for variety, so you can choose a pair that suits your mood or outfit for the day. The boxer briefs are lightweight, with dimensions measuring Height: 1.0 inches, Width: 8.0 inches, Length: 13.0 inches, and Weight: 0.75 pounds, making them easy to store and carry around. Overall, these boxer briefs combine functionality and comfort, making them a great addition to any man's wardrobe.

To buy this product, click here.

10. Hanes Men's X-temp Total Support Pouch Boxer Brief

Hanes Men's X-Temp Total Support Pouch Boxer Brief, Anti-Chafing, Moisture-Wicking Underwear, Multi-Pack, Long Leg-Assorted, Large

The Hanes Men's X-Temp Total Support Pouch Boxer Brief is ideal for men looking for comfortable, anti-chafing, and moisture-wicking underwear. Whether you are an athlete, someone with an active lifestyle, or just seeking daily comfort, this product is designed to meet your needs.

Pros:

  • Anti-chafing design for maximum comfort.
  • Moisture-wicking fabric keeps you dry and fresh.
  • Long leg design prevents riding up.
  • Total Support Pouch offers additional support.
  • Comes in a multi-pack for great value.

Cons:

  • Limited color options in the assorted pack.
  • May be too long for some preferences.

The Hanes Men's X-Temp Total Support Pouch Boxer Brief features an anti-chafing design that ensures maximum comfort for the wearer. This is particularly beneficial for athletes and individuals with an active lifestyle, as it prevents skin irritation caused by constant movement. The moisture-wicking fabric keeps you dry and fresh, drawing sweat away from your skin, making it ideal for long hours of wear.

Additionally, the long leg design prevents the underwear from riding up, which can be a common issue with shorter boxer briefs. The Total Support Pouch offers extra support, ensuring that everything stays in place without feeling constricted. Available in a multi-pack, this product provides great value for money, allowing you to stock up on essential underwear without breaking the bank. However, the limited color options in the assorted pack and the length may not suit everyone's preferences.

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Frequently Asked Questions

What Are The Best Thermal Underwear For Men?

The best thermal underwear for men include options like Thermajohn, WEERTI, and Fruit of the Loom. They offer great insulation, comfort, and durability.

How Do You Choose The Right Size?

To choose the right size, refer to the specific brand's size chart. Measure your waist and inseam for accurate fitting.

Are Fleece-lined Thermals Better?

Yes, fleece-lined thermals offer extra warmth. They are perfect for extremely cold weather, providing additional insulation and comfort.

Can You Wear Thermals As Outerwear?

Thermals are designed as base layers. However, some can be worn as outerwear for casual activities, depending on the style.

Do Thermal Underwear Wick Moisture?

Yes, many thermal underwear brands, like Hanes and Under Armour, feature moisture-wicking properties. They help keep you dry and comfortable.

How Often Should You Replace Thermal Underwear?

Replace thermal underwear every 1-2 years. This ensures optimal warmth and comfort as materials can wear out over time.

Conclusion

Choosing the best long underwear for men ensures warmth and comfort during cold weather. From the durable realtree men's heavyweight thermal long johns to the eco-friendly fruit of the loom recycled waffle thermal underwear, options are plentiful. Consider the thermajohn fleece-lined base layer for extreme cold.

Weerti offers another reliable fleece-lined option. For daily wear, hanes and under armour provide versatile choices with their comfort flex fit and heatgear armour leggings. Each product on this list is designed to meet different needs and preferences. Whether you need heavy-duty warmth or everyday comfort, there's an option for you.

Remember to choose the right size and material for the best experience. Stay warm and comfortable with these top long underwear picks.

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