Best And Warmest Base Layers For Hunting In 2025 Tested And Reviewed

Today's base layers are very different from the long johns we used to wear 30 years ago. Technology and innovation have created great base layers that are far superior to those from long ago. From lightweight breathable options to Merino wool, these are the best base layers for hunting.

We are a team of REAL HUNTERS and these are the exact base layers that we use to stay comfortable while hunting.

Our Top Picks

List Of The Best Hunting Base Layers

How We Chose The Best Base Layers For Hunting

We chose these base layers by having our staff members share the base layers that they use for all the different hunting situations. We then reached out to our readers via email and asked them all; "What are your favorite base layers for hunting and why?"

I then gathered all of these base layers for testing. I then tested them for the following criteria:

• Warmth
• Ability To Wick Moisture Away From The Skin
• Weight To warmth Ratio
• Comfort
• Fit
• Special features
• Price

The base layers below are the ones that came out on top.

Best Lightweight: Cabela's Instinct Merino Wool Top and Bottoms

When it comes to lightweight base layers, this base layer from Cabela's is made for performance. Its main claim to fame is its light weight, but it has a number of other features that promote agility and accuracy while hunting. Of course, it's great for layering under an outer layer and staying warm over long periods as well.

Features:

• 86% Merino wool blend (11% nylon, 3% spandex)
• Comfort stretch fibers
• Temperature regulation
• Offset side seams
• Flatlock stitching
• Moisture and odor control

What We Liked:

• The wool is definitely our favorite part of this clothing. It's comfortable and versatile for changing weather conditions.
• It is excellent for active hunting and hiking because it dries out quickly.
• The addition of spandex and stretch fibers helps the shirt move with you. This prevents chafing, a common problem with wool.
• We really like the odor management feature.

What We Didn't Like:

• Made with natural material, the Cabela's Instinct is a little pricier than other wool synthetic blends (though well worth it, in our opinion).

If you're an active hunter, we highly recommend the Cabela's Instinct. This could mean you still hunt in wild, rough conditions, or it could just mean you get a workout in with your climbing tree stand. Either way, you'll benefit from the wool design, which stays warm even if you start sweating. At the same time, it's comfortable and stretchy unlike other wool garments. This is our favorite layering system.

Best Midweight: RedHead Elite Midweight Long Sleeve Crew and Bottoms

At Deer Hunting Guide, we really like midweight base layers since they are so functional and versatile, often working for the entire deer hunting season. Of all the midweight base layers we looked at, the RedHead Elite stood out for its great features, low price and hunting-focused design.

Features:

• 94% polyester blend with 4% spandex
• Grid technology
• Built-in stretch
• 4MOST odor control
• Flatlock seams
• Thumbholes

What We Liked:

• The 94% polyester makes this a durable shirt while the 4% spandex gives it a stretch that moves with your body.
• The grid technology provides advanced thermoregulation that keeps you warm while you're sitting still and cool when you're moving around.
• The 3D airflow waistband adds breathability that other polyester base layers don't have.
• It might be a small detail, but we love the thumbholes. For one, they keep the sleeves from riding up your arms, but more importantly, they combine with gloves to keep your wrists warm.

What We Didn't Like:

• The polyester design is less breathable than other blends.

If you hunt in a place where deer season involves weather ranging from summer heat to winter freeze, you're going to need to layer. In this case, a midweight layer might be a good choice, the RedHead Elite is our choice. It has a stretchy design with grid thermoregulation technology.

Warmest: XPS Expedition Weight Long Sleeve Turtleneck and  Pants

For extra cold weather, you need a heavyweight base layer. Our favorite is the XPS Expedition long-sleeve turtleneck and thermal pants. They are very warm overall, but we like the turtleneck design in particular. It's comfortable and adds extra insulation for your neck.

With micropolyester fabric and hollow-core yarns, the insulation is some of the best for a synthetic garment, but the weight makes it great for layering. Plus, features like odor control make it effective for hunting.

Features:

• 100% micropolyester
• Hollow-core yarns
• X-Odor technology
• Half zipper
• Medium collar

What We Liked:

• The XPS thermal technology provides the warmth of a heavyweight layer without the usual bulk. This way you can easily add more top layers.
• Heavyweight base layers are even more likely to cause sweating, which could produce odor that could alert game. X-Odor technology is one of the best anti microbial odor-control technologies we've found.
• The turtleneck design helps insulate your neck, but the half zipper gives you airflow if you start to heat up.
• Despite being a heavyweight bottom, these pants contour to your body and take up minimal space so you can add multiple layers on top of them.

What We Didn't Like:

• The arms are a bit tight, and that can limit your range of motion, especially if you're hunting with a bow.

In most of the US, late deer season hunting means cold temperatures, snow and ice. You need a base layer that provides a good foundation of warmth like the XPS Expedition Weight 3.0 while still being thin enough to let you add heavier layers on top. Top it off with waterproof jacket and pants, and you will stay comfortable all day in the tree stand, even in harsh conditions. This is the warmest base layer for hunting that we have tested.

RELATED: Warmest Hunting Boots Tested With Reviews 

Best Merino Wool: Smartwool Tops And Bottoms 

The Smartwool base layers are made of 100% Merino wool and made in the US. They combine comfort, odor resistance and, most importantly, warmth by insulating your body heat. This means it'll keep you warm even if you're not moving.

Another big draw is the shirt's resilience. It's machine washable. Similarly, it's easy to pull on without stretching it out thanks to the zipper at the collar.

Features:

• 100% Merino wool
• Made in USA
• Pull-on closure
• Machine washable
• Odor resistance
• Chafe-free design
• Dries quickly

What We Liked:

• 100% wool means natural temperature regulation based entirely on your own body heat. It lets you sit for long hours without getting cold.
• While some wool garments can be itchy or chafing, the Smartwool is smooth and soft. This also lets you sit comfortably in one place all day.
• The quarter zip allows you to pull it on and take it off easily without stretching out the collar. Plus, you can close off the neck or open it for airflow as needed as the weather changes.
• Smartwool's design is perfect for climbing up into a deer stand. These bottoms are stretchy and comfortable, so they stay in place while you get into position.
• It's hard to find a better price with this material.

What We Didn't Like:

• The zipper can get in the way if you're adding a lot of layers on top, and it serves little purpose if you can't get down to it.
• The wool material is thinner on this top, so it may wear down faster than similar shirts.

We specifically recommend the Smartwool Base Layers if you're going to be sitting still in the same place for a while. It is an excellent insulator and traps just the right amount of body heat to keep you comfortable during the deer hunting season. You can see why it made it to our list of the best gifts for hunters. This is on top of numerous other great features like the quarter zip design.

Best Kuiu: Kuiu Peloton Top And Ultra Merino 145 Bottom

Few people have bad things to say about Kuiu. They make top-shelf hunting gear and at a great value to boot. If you love Kuiu and are looking for a base layer, you're in luck. Their Peloton 118 lives up to their name and is one of our favorites all around. And it's specifically designed for hunting, so you get helpful features and even have several camo patterns to choose from.

The lightweight design is ideal for early season and warm weather hunting conditions.

Features:

• Lightweight Toray Primeflex material
• Athletic fit
• Flatlock seams
• Side panels
• Raglan sleeves
• UPF 50+ sun protection
• Makspec odor control
• They dry quickly
• Abrasion resistance

What We Liked:

• The Kuiu Peloton Crew-T does more than just insulate. It protects you from the sun, masks your odor and wicks away your sweat.
• Like other Kuiu products, this shirt is highly durable, especially thanks to the abrasion-resistant design. This makes it an ideal choice if you hunt often every season.
• This Crew-T is comfortable up against the skin beneath an outer layer since it has Flatlock seams, side panels and Raglan sleeves. It's good for sitting still or hiking around in the woods.
• The camo options mean you can take off all your other layers and still stay hidden, further helped by the UPF 50+ sun protection.

What We Didn't Like:

• This shirt has an athletic fit that may not work for all body types, though we found that it stretched well to adapt to most people.
• This specific Kuiu model is designed for hot weather or mild conditions, so it's not the best for the late season unless you add several layers on top.

If you want the quality of Kuiu, our choice is the Peloton 118 Crew-T. It's well-made and highly durable. You know that you're getting a base layer designed specifically for hunting with advanced odor control as well as a comfortable fit that gives you a good range of motion.

Kuiu ULTRA Merino Bottom

Yep, you can get Kuiu quality and Merino wool temperature regulation all in one product. These bottoms are incredibly warm yet simultaneously comfortable, so they're definitely good for hunting. 

Features:

• Nuyarn blend 
• Flatlock seams
• Crotch gusset
• Functional fly
• UPF 50+ sun protection
• Odor resistance
• They dry quickly

What We Liked:

• The Nuyarn blend means you get the warmth of wool without overheating with a stretch that makes the pants comfortable to walk in.
• The crotch gusset and flatlock seams minimize chafing or bunching.
• The functional fly makes things a lot easier if you have multiple layers on top.

What We Didn't Like:

• These pants are a bit on the thick side, so although they're very warm, they're harder to layer than thinner leggings.
• The light Merino bottoms are a heavier weight than the Peloton Crew-T we listed above. If you want the exact same weight on top and bottom, check out Kuiu's Merino hunting tops.

Kuiu makes a lot of great products, our favorite being these pants. They maintain your body temperature even as the weather changes, but their functionality allows you to hunt effectively.

Best Sitka Gear: SITKA CORE Lightweight Top And Bottom

At Deer Hunting Guide, while we like other brands, we're huge fans of Sitka gear. They're passionate hunters who test their products in the field and incorporate technology they've developed specifically for hunting situations. For example, the Sitka Core base layers uses their digital camo pattern known as Gore Optifade that has been shown to fool deers' eyes effectively.

RELATED: Is Sitka Gear Worth It

Features:

• 100% polyester
• Pull-on closure
• Machine washable
• Stretch knit
• Gore Optifade digital camo patterns
• Thumb loops

What We Liked:

• We love that the Sitka Core base layers incorporate the extensively researched Gore Optifade camo design, so even if you take off your top layers, you're still expertly hidden.
• The polyester fabric is thin and quick drying, so you can add a lot of layers on top and still stay comfortable.
• The thumb loops keep the sleeves pulled down over your wrists, which keeps your wrists warm and prevents the sleeves from bunching up at the elbows.
• These leggings are warm on cool mornings, but they wick away moisture as it warms up so you stay dry and odorless.
• The proprietary Polygiene technology includes antimicrobial silver salt that kills bacteria before they can cause odors that give you a way to a deer's powerful nose. 

What We Didn't Like:

• Made from 100% polyester, the material can feel a bit sticky at times, especially if you get really sweaty.

We suggest looking through all the camo patterns you can get the Sitka Core base layers in and picking the one that best matches the environment you hunt in. 

RELATED: Kuiu vs Sitka Gear

Best First Lite: First Lite Wick Top And Bottom 

First of all, consider the blend of 65% wool, 33% nylon and 2% spandex. This gives you great all-weather temperature regulation but a feel and look that makes it work as a normal t-shirt or top layer. It's also just well-constructed with mesh panels and durable knitting, not to mention several advanced features.

Features:

• 65% Aerowool with 33% nylon and 2% spandex
• Active Particle Technology moisture wicking
• Next-to-skin fit
• Mesh ventilation panels
• Machine washable
• Solid color and camo designs

What We Liked:

• The temperature regulation is so good that it works as a warm base layer or comfortable top layer in mild-warm conditions.
• The mesh panels provide airflow that cools you off in areas more prone to sweat. This keeps you comfortable and minimizes odor buildup.
• The blend is a perfect combination of functionality and fit. The shirt adapts to the shape of your torso without being too tight, making layering easy and not getting in the way of your other gear.
• The fabric lining complements the stretch so that the leggings also glide against the skin, making walking and climbing more comfortable yet keeping the leggings correctly positioned.

What We Didn't Like:

• This is a short-sleeve t-shirt, so you will likely need a mid-layer before your top camos if you're hunting extra cold conditions.
• If you're not going to wear thick socks and hunting boots, the three-quarters fit bottoms may leave your ankles cold.

Here is a great video showing the First Lite Wick Ultra Lite in action.

This is our favorite of all the First Lite Base Layers. Although it is a t-shirt, it still provides a lot of warmth for its bulk. More importantly, it can also work as an effective top layer. It comes in several different camo patterns and has mesh ventilation panels and natural moisture wicking that keeps you cool and dry.

Best Heated: ActionHeat 5V Heated Base Layer Top And Bottoms

When the temperature really drops, having a heated base layer can help to keep you warm and save your hunt. There is a lot of junk out there in the heated hunting clothing market, but the best that we have found is the ActionHeat heated base layer.

Features:

• ActionFlex material constructed of 92% polyester/8% spandex
• Tri-Zone heating with 3 built-in panels
• Long-lasting warmth up to a toasty 130°F
• Touch-button control with 3 heat settings
• LED power indicators display remaining battery life
• Powerful, rechargeable 5V batteries
• Provides warmth for up to 4.5+ hours (on low)
• Includes power bank, and USB charging kit

What We Liked:

• We really like the fit on this shirt. It is roomy with enough stretch to be used for bow hunting in cold conditions.
• We like that it is rechargeable and the batteries charge pretty quickly.
• We like the easy, touch button control.
• We like that it has 3 heat settings.

What We Didn't Like:

• The batteries do not last as long as they are advertised. We only get about 3 to 3.5 hours out of a single charge on the lowest setting.
• The heating elements are pretty small.

There are not a lot of great options out there for heated base layers, but the Actionheat is our go to here at deerhuntingguide.net.

RELATED: Best Heated Socks For Hunting 

What To Look For When Buying Base Layers 

RELATED: What Is The Hunter's Most Important Item Of Clothing?

Base Layer Materials: Wool Or Synthetic?

Merino Wool

Merino wool is an ideal fabric choice for hunting base layers. It's a natural material (if it's good enough for sheep…), so its ability to regulate temperature is unparalleled. In other words, it keeps you warm when it's cold and cool when it's hot. It even regulates temperature in wet conditions.

As an added bonus, wool is naturally odor resistant. Deer can smell better than they can see, so that's a big plus.

Synthetic

On the other hand, synthetic materials like polyester and nylon have certain strengths. Biggest of all is probably just the price. They're a lot less expensive.

Synthetic base layers are also lightweight and quick-drying, so while they might not be quite as warm as wool, they can be easier for layering.

One thing that is important to mention here is that cotton is the wrong choice for hunting clothes. It doesn't matter if we are talking about socks, base layers or pants. You should never use cotton next to your skin while hunting.

RELATED: Best Rain Gear For Hunting

Lightweight, Midweight or Heavyweight?

Lightweight

Base layers labeled as "lightweight" is a good choice if you hunt in milder climates such as those in the Deep South or bow hunting during the early season. They're designed to be breathable and wick away moisture, which means that if you move around and get hot, you'll still be comfortable. Similarly, they're thinner, so you can put all your layers on top and then take them off when the temperature rises.

RELATED: Best Lightweight Hunting Boots

Midweight

Base layers defined as "midweight" are best-of-both-worlds garments, or at least they try to be. They usually have more warmth than lightweight layers, but they still provide easy layering. 

We recommend midweight base layers for hunters who deal with drastic temperature changes. This is actually true for a lot of deer hunters since deer hunting season is in the fall when nights are cold but days are hot. This is especially true in the Midwest. 

Heavyweight

When the mercury really drops, you want a heavyweight base layer. They're designed to trap in your body heat and keep you warm even in extra cold weather, often below freezing. This is best for late-season deer hunting in December and January and in northern states in particular. Heavyweight base layers can be particularly effective at keeping you warm when paired with a good set of hunting bibs.

Budget

We recommend considering how important a base layer is to your hunt before determining your budget. If you're a bowhunter who's regularly in a stand or blind during the late season, especially in a cold climate, you need a high-performing base layer made of the best materials. However, if you just need one to keep in your closet in case of a cold snap, you can save some change.

After that, keep in mind that you generally get what you pay for when it comes to base layers. Quality materials and extra features like odor control can drive up prices, but they also give you an edge while hunting.

Also keep in mind that high quality base layers will last for years if cared for and stored properly.

Frequently Asked Questions

What should I wear as a base layer in hunting?

Your hunting base layers should be warm but thin, like the Redhead E.C.W.C.S Military Fleece Thermal Base Layer. The idea is to provide an initial point of insulation to trap your body heat while still allowing you to add layers on top.

What is the best base layer for upland hunting?

Since upland hunting involves a lot more walking and movement than deer hunting, you want a layer that's warm but still breathable and moisture wicking like the Cabela's Instinct Base Layer. This way you're insulated and warm when you're standing still, but you don't overheat when you start moving. 

What is the best base layer for extreme cold weather?

In extreme cold weather, you need a base layer like the Under Armour ColdGear Base 4.0 Base Layer or the E.C.W.C.S Military Fleece Thermal Base Layer. In other words, you need something that has intense insulation without preventing you from adding even more insulation over it. At the end of the day, extreme cold weather requires numerous layers.

Are base layers warmer than thermals?

Thermals, or thermal underwear, are a type of base layer, and the terms are often used interchangeably. However, hunting-specific base layers are generally thicker and warmer than simple thermals.

What is the warmest material for hunting?

Wool is considered by many, including the staff of Deer Hunting Guide, to be the warmest material for hunting. It provides great insulation along with the natural breathability, moisture wicking and odor control. 

That said, modern technology has improved a lot, and synthetic fibers like polyester and nylon can be quite warm. This is especially true if they feature advanced designs like micro-grids.

RELATED: How To Keep Your Feet Warm While Hunting

Final Thoughts

Most hunters need a base layer, especially if they hunt the late season when temperatures drop. Our top recommendation is the Redhead E.C.W.C.S Military Fleece Thermal Base Layer thanks to its high insulation, comfortable fit and easy layering. If you're looking for wool, we also love the Ibex Woolies Base Layer.  These are the hunting base layers used the most by the DeerHuntingGuide.net team.