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 Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (X-Large, Black)
Men Thermal Underwear Long John Set for Cold Weather Mens 2 pc Long Sleeve Top and Pants Fleece Lined Base Layer Thermals XXXL, White
CL convallaria Mens Thermal Underwear Set, Long Johns for Men Winter Hunting Gear Sport Base Layer Top and Bottom Midweight Black M
Material
Polyester spandex
Polyester spandex
Polyester
Color Styles
6
6
7
Moisture Wicking
-
Our Top Pick
Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (X-Large, Black)
Material
Polyester spandex
Color Styles
6
Moisture Wicking
-
Men Thermal Underwear Long John Set for Cold Weather Mens 2 pc Long Sleeve Top and Pants Fleece Lined Base Layer Thermals XXXL, White
Material
Polyester spandex
Color Styles
6
Moisture Wicking
CL convallaria Mens Thermal Underwear Set, Long Johns for Men Winter Hunting Gear Sport Base Layer Top and Bottom 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.

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (X-Large, Black)
  • Ultra Soft Fleece: Designed with a fleece lining & quality material, these ultra soft mens thermal underwear set will keep you feeling comfortable throughout the day
  • Layer Up: Layering is essential to ward off the cold, so bundle up with a pair of mens thermals this winter and stay comfortable while outside or in bed as a pajama
  • Heat Retention: When it comes to warmth and everyday wear, these long johns for men is designed specifically for you to stay protected from the cold
  • Moisture Wicking: Stay dry with these long underwear mens as they're made from breathable fabric that effectively wicks away moisture and perspiration

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

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (X-Large, Black)
  • Ultra Soft Fleece: Designed with a fleece lining & quality material, these ultra soft mens thermal underwear set will keep you feeling comfortable throughout the day
  • Layer Up: Layering is essential to ward off the cold, so bundle up with a pair of mens thermals this winter and stay comfortable while outside or in bed as a pajama
  • Heat Retention: When it comes to warmth and everyday wear, these long johns for men is designed specifically for you to stay protected from the cold
  • Moisture Wicking: Stay dry with these long underwear mens as they're made from breathable fabric that effectively wicks away moisture and perspiration
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 Underwear Long John Set for Cold Weather Mens 2 pc Long Sleeve Top and Pants Fleece Lined Base Layer Thermals XXXL, White
  • Men's winter gear thermals including a shirt and bottom leggings made of 92% soft lightweight polyester and 8% stretch spandex that hugs your body like a second skin. Keeping you warm and comfortable....
  • After a long day wearing the thermals you will feel fresh and pleasant. Our Thermo clothes wick away and remove all moisture from your body, leaving your skin dry and warm. The apparel drys quickly...
  • The thermals enable you continue with all your activities. The fabric hugs your body, without restricting any movements. You won't feel the thermal long johns tops and bottoms at work, while running,...
  • The cozy interior fleece lined baselayer is super soft to the touch. Feels great on your skin. We have a variety of sizes, accommodating big and tall males, young teenagers and boys. Our sizes range...
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!
CL convallaria Mens Thermal Underwear Set, Long Johns for Men Winter Hunting Gear Sport Base Layer Top and Bottom Midweight Black M
  • Extreme Warmth and Comfort: Perform your best, even on a chilly day when you wear CL fleece thermal underwear ! Adding some extra cozy, warm fleece to the mix, CL long johns for men amazingly help to...
  • Strong Moisture Wicking(Without the Sweaty Mess): Our fans say the unique breathable, moisture-wicking fibers on CL thermal underwear will wick away moisture to keep you dry with no sticky or clammy...
  • 4-Way Stretch Insulated Underwear: While adopting the design of the Four-way stretch, we improved the crotch and armpit according to the feedback of market customers. make the reach and squat more...
  • Easy Care Of Base Layer Set:Our men's base layer top and bottom are set with no labels in order to obtain greater comfort, which can reduce any skin irritation. You can slip them on and off easily and...
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 Thermal Underwear Set Soft Fleece Lined Long Johns Heavyweight Base Layer Top & Bottom Winter Thermoflux 300 Extra Warm M24 X-Large Black
  • 【Ultra Soft & Warm】LAPASA thermal underwear set are made with a polyester spandex micro-fleece fabric to provide the ultimate warmth, to weight ratio when the temperature begins to drop and...
  • 【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. When you're going...
  • 【LAYER OF COMFORT】These thermal underwear set 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...
  • 【SNUG】Our thermal top and bottom are made to have a snug fit that ensures no bunching around your waistline or sleeves to reduce heat loss and better fit when worn under outer layers. The...
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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