5 Best Thermal Underwear for Hunting

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Getting the right base layer can determine whether you’ll have a great time or a miserable one. And for harsh cold temperatures, you will need thermal underwear to keep your body warm and protected. Here’s our list of the best thermal underwear for hunting to keep you warm and ready for the “big one”!

Here are the Best Thermal Underwear that we have included in our review

Our Top Pick
Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set with Fleece Lined (X-Large, Black)
Men Thermal Performance Underwear Set by Outland; Base Layer; Soft Fleece; Warm Long Sleeve Shirt and Long Johns (XXXL, White)
Thermal Underwear Set Winter Hunting Gear Sport Long Johns Base Layer Bottom Top Midweight Black M
Material
Polyester spandex
Polyester spandex
Polyester
Color Styles
6
6
7
Moisture Wicking
-
Our Top Pick
Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set with Fleece Lined (X-Large, Black)
Material
Polyester spandex
Color Styles
6
Moisture Wicking
Men Thermal Performance Underwear Set by Outland; Base Layer; Soft Fleece; Warm Long Sleeve Shirt and Long Johns (XXXL, White)
Material
Polyester spandex
Color Styles
6
Moisture Wicking
-
Thermal Underwear Set Winter Hunting Gear Sport Long Johns Base Layer Bottom Top Midweight Black M
Material
Polyester
Color Styles
7
Moisture Wicking

OUR TOP PICK – Best Thermal Underwear for Hunting

Our top pick is the Thermajohn Men’s Ultra Soft Thermal Underwear Long Johns Set. With its unique design, this thermal underwear set offers full flexibility that will keep your body warm without limiting your body movement. This underwear’s breathable and stretchable fabric is perfect for any extreme activity since they absorb excess moisture and wick sweat away from your skin.

Read on for more information, or click the link below to read more reviews on Amazon.

Recent Price Drop!
Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set with Fleece Lined (X-Large, Black)
  • Mens thermal underwear is a lightweight thermal set of both a thermal top and bottom made of a poly-spandex material that will wick away moisture to keep you dry with no sticky or clammy feeling so...
  • Made of premium fabric, thermals for men have smart odor control to prevent the spread of smells as well as absorbing odor-causing enzymes so they won’t stick to your skin. You can remain confident...
  • Built with flexibility, the thermal underwear is highly stretchable to offer full mobility. The fabric won’t hinder your movements so you can move freely while at the gym, office, or home. They are...
  • Men thermal underwear set is soft against the skin, yet its strong seams won’t rip or tear prematurely, offering long life. They fit snug like a second skin for perfect heat retention minimizing...

When it comes to hunting, you are exposed to the elements of nature – which you have to prepare for when planning a trip. When you have the right hunting clothes with you like your hunting vest and gloves, you can stay comfortable for a longer time. Thus, increasing your chances of success.

The clothes you wear depend mostly on where you are hunting and the season. For instance, you have to wear more layers during winter or colder days. You will need a shell layer and a mid-layer. There’s also the underwear or aka base layer, which is the first and the clothing closest to your body. 

Top 5 Thermal Underwear for Hunting

Best Overall: Thermajohn Ultra Soft

Recent Price Drop!
Thermajohn Men's Ultra Soft Thermal Underwear Long Johns Set with Fleece Lined (X-Large, Black)
  • Mens thermal underwear is a lightweight thermal set of both a thermal top and bottom made of a poly-spandex material that will wick away moisture to keep you dry with no sticky or clammy feeling so...
  • Made of premium fabric, thermals for men have smart odor control to prevent the spread of smells as well as absorbing odor-causing enzymes so they won’t stick to your skin. You can remain confident...
  • Built with flexibility, the thermal underwear is highly stretchable to offer full mobility. The fabric won’t hinder your movements so you can move freely while at the gym, office, or home. They are...
  • Men thermal underwear set is soft against the skin, yet its strong seams won’t rip or tear prematurely, offering long life. They fit snug like a second skin for perfect heat retention minimizing...
MaterialPolyester; spandex
WeightLightweight
Caring RequirementsMachine-washable

Our top pick for the best thermal underwear for hunting is the Thermajohn Long Johns Set. It comes with a top and a bottom, each offering great wicking properties and enough heat for moderate conditions. It’s also flexible and stretchable, providing you with full mobility. So overall, for its features, this underwear set offers great value for the price.  

This pair of thermal underwear have smart odor control features, which helps prevent any bad smell from developing. Moreover, it’s soft against the skin, and it fits snugly, making it perfect for heat retention.  

Best Lightweight: Outland Thermal Performance

Men Thermal Performance Underwear Set by Outland; Base Layer; Soft Fleece; Warm Long Sleeve Shirt and Long Johns (XXXL, White)
  • Men's Extreme Ultralight Warmest Top and Pant Sets makes your favorite cold weather activities more pleasant. Whether you are hiking; biking; hunting; snowboard; ski; camping or other outdoor sports;...
  • The Thin Lightweight Thermal Clothing maintains your body heat at a cool temperature by wicking moisture away from your skin; drying quickly and insulating from the cold.
  • The Basic Undershirt and Bottom have an interior microfiber fleece that is soft and cozy; feels great against your skin.
  • We have your size! For adult men; juniors; teen; BIG AND TALL SIZES. SIZES RUN SMALL: if you don't like a tight fit; take a size up. Several solid color options, including tactical camo.
MaterialPolyester; spandex
WeightLightweight
Caring RequirementsMachine-washable

Here’s another lightweight thermal underwear that’s ideal for moderately cold conditions. The Outland underwear set is moisture-wicking, quick-drying, and helps keep you insulated by keeping your body heat at a cool temperature. It’s also soft and feels good against your skin. So you can stay comfortable while hunting in the woods. 

While this underwear has a snug and slimming fit, it won’t restrict your movements. It is flexible and doesn’t come with any heavy bulk. Furthermore, you can wash it multiple times without losing elasticity. 

Best Midweight: CL Convallaria Winter Hunting Gear

Recent Price Drop!
Thermal Underwear Set Winter Hunting Gear Sport Long Johns Base Layer Bottom Top Midweight Black M
  • ULTIMATE THERMAL RETENTION: Designed with high quality fleece lining, the thermal underwear mens is windproof, Set of long sleeve thermal shirt and bottoms can keep you warm while running, cycling,...
  • WICKING BREATHABILITY & QUICK DRY: Breathable and moisture wicking fabric is perfect to keep sweat away and dry fast, it perfectly repels odors and unpleasant smells left behind from sweat and dirt,...
  • STRETCHABLE & ABRASION RESISTANT: Made of 91% polyester+ 9% spandex, this thermal underwear offers maximum freedom and support of your body, protecting your muscle trauma during training and keeping...
  • DESIGN FOR OUTDOOR SPORTS: Use as base layer cold weather mens thermal hunting gear for outdoor compression active sports,such as rash guard, running, squat, weight training, motorcycle cycling, yoga,...
Material100% polyester
WeightMidweight
Caring RequirementsMachine-washable

The thermal underwear by CL Convallaria features great thermal retention. Thus, it can efficiently keep you warm while hunting during cold conditions. It is windproof, breathable, moisture-wicking, and dries quickly. It can also repel odor and unpleasant smells from sweat or dirt, making it great for multi-day hunting trips. 

This is a comfortable and stylish pair of underwear that will work great under your hunting clothes. It is highly elastic, providing you with the perfect fit. It’s also less itchy and irritating compared to regular underwear. 

Best Heavyweight: Lapasa Thermal Underwear

LAPASA Men's Heavyweight Thermal Underwear Long John Set Fleece Lined Base Layer Top and Bottom M24, Heavyweight, X-Large, Black
  • 【OPTIONS】Lapasa offers a wide variety of thermals to suit your needs. Thermoflux 100 - LIGHTWEIGHT for brisk and cool weather to stay dry and cosy, Thermoflux 200 - MIDWEIGHT for cooler...
  • 【MATERIAL WARMTH】LAPASA thermals are made with a polyester spandex micro-fleece fabric to provide the ultimate warmth to weight ratio when the temperature begins to drop.
  • 【LAYER OF COMFORT】These thermals are designed to be thin but effective at insulating body heat. The light material is not just able to retain body heat but simultaneously wick away moisture to...
  • 【FLEX FIT】The elastic polyester spandex used has 4-way stretch to give you flexibility to move with you and keep you warm without sacrificing your range of motion or comfort.
MaterialPolyester; spandex
WeightHeavyweight
Caring RequirementsMachine-washable

If you’re planning to hunt in the teens or below 0, consider the Lapasa Men’s Heavyweight Thermal Underwear. It’s designed to protect you from extreme cold and frigid temperatures and keep you dry by wicking away moisture. It is also made with a fleece-lined fabric, which helps maintain your body heat. 

The Lapasa underwear features a draping tailoring, providing you superb comfort and body fit. This allows you to move freely, which is required when you’re out hunting. Overall, this is a great pair of underwear. It also has a lot of positive reviews from individuals who have used it for hunting. 

Best Wool Thermal: Meriwool Base Layer – Merino Wool

Material100% merino wool
WeightMidweight
Caring RequirementsMachine-washable on the cold setting, safe for tumble dry 

Are you looking for wool thermal underwear? Then the Meriwool Thermal Pants is your best choice. Made with 100% merino wool, it’s super soft, breathable, and quick-drying. Additionally, it has great sweat-wicking and odor-resistance properties. This can help you stay dry and comfortable while hunting during cold weather conditions. 

Best Thermal Underwear for Hunting – Buying Guide

With the many models sold today, it can be challenging to choose which underwear to buy. So to help you out, here are some of the things you should look out for when choosing thermal underwear. We also used these factors to determine which products to include in our list of the best thermal underwear for hunting. 

1. Check the material

When it comes to thermal underwear or the base layer, the material is crucial. This is because some fabrics can’t wick or move sweat and moisture off your skin. For example, cotton. You should never wear cotton underwear when hunting as it absorbs sweat, making it feel damp, wet, and clammy. And when cotton gets wet, it won’t be able to hold heat. Thus, it will only make you feel chilly. 

Your better options include wool and synthetic. Wool is a tried and tested material that can effectively keep you warm, wick sweat, and dry fast. You can also choose synthetic materials like polyester, lycra, nylon, and spandex. They are designed with great moisture-wicking properties as well as heat retention. 

2. Weight matters

The weight of the underwear matters too. You have to select the weight that best matches the location of your hunting trip. Generally, the thicker and heavier the fabric, the more warmth it provides. Here are the three basic weights to choose from:

  • Lightweight: ideal for moderate to cool temperatures
  • Midweight: suitable for cold temperatures
  • Heavyweight: recommended for below-freezing conditions

Some companies offer ultralightweight or featherweight base layers, which are more ideal for mild to cool weather conditions. There are also terms like “expedition weight,” which is on the heavier side of the spectrum. 

3. Find the right fit

For a wicking fabric to work, it needs to be directly in contact with your skin. Thus, look for thermal underwear with a snug fit. 

4. Caring requirements

Some thermal underwears are not cheap. Thus, you want to keep and care for them as long as possible to prevent spending again. However, some products can require more care requirements than others, i.e. hand washing. So when choosing thermal underwear to buy, check for caring requirements, and determine whether you’re up for it or not. 

As a reference, the easiest fabrics to care for are synthetics. You can just throw them in the washing machine and you’re done. Some wool can also be washed through the machine, and others can’t. Silk fabrics are on the more intricate side, which requires to be hand-washed or through a washing machine’s delicate option.  

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