Gear Up with Earth's Best Merino Wool Hunting Long Johns - Where Innovation Meets Field-Proven Performance

Engineered to deliver the world’s most advanced thermal regulation system: Bamboo fiber rapidly absorbs moisture faster than any other natural material, then transfers it to ultra-fine 15.5µm Australian merino wool - the pinnacle of efficient evaporation technology.

Exclusive to Hillman, 15.5µm merino wool is a signature innovation, unmatched in performance and precision.

The combination of natural bamboo fiber and the finest merino wool leverages the unique strengths of each fiber. By combining their best qualities, this technology Amplifies performance by 50% compared to base layers made solely of merino wool.

Engineered to master sweat, moisture, and climate control, these merino-bamboo Thermal Base Layer Pants combine the best of both worlds to keep you warm in freezing conditions and cool when the action heats up.

Naturally odor-resistant, thanks to the antibacterial properties of merino wool, bamboo viscose, and advanced anti-odor threads, it ensures you stay fresh even during the most demanding hunts.

Versatile and technically advanced, they're designed to function as the ultimate next-to-skin underwear or as best-in-class base layer.

Perfect for thermoregulation in a range of conditions:

5°C (41°F) down to -30°C (-22°F): Works seamlessly paired with additional layers.

Part of Hillman’s 6-Layer System: For maximum efficiency, pair this base layer with Hillman’s 6-Level Layering System, the most advanced layering technology for hunting. Learn more here.

Dominate the hunt with SYNERTECH™ Hunting Long Johns - Bamboo-Merino All-Season Technology - Engineered to Master Heat, Cold, and Everything Between

We craft our gear using the finest Australian merino wool yarns, expertly woven with 100% natural bamboo fibers through advanced interlock technology. The result? A second-skin layer designed for ultimate comfort and peak performance. These aren't just thermal base layer pants – they're your ultimate defense against the elements, unrivaled in the hunting world.

Engineered with antibacterial and anti-odor threads, this base layer keeps you fresh no matter how intense the hunt gets. Every detail is built to withstand the toughest conditions.

For those who refuse to settle for less, Hillman delivers. The Merino-Bamboo Thermal Base Layer Pants combines world-class fabrics with cutting-edge functionality, redefining what’s possible in the hunting industry. It’s guaranteed to outperform anything else on the market.

Now it's your turn to favor your body in the best way,

we guarantee there's no alternative. If for any reason

you don't like it - send it back, no questions asked!

Explore Hillmans 2BL Merino Wool Hunting Long Johns size chart, featuring EU sizes 44-64 (US 30-48). Detailed waist and inseam measurements in both centimeters and inches ensure you find the perfect fit.

A gold and white design prominently displays INNOVATIONS in bold, white capital letters on a gold background, evoking the refined craftsmanship of Hillmans 2BL Merino Wool Base Layer-Hunting Long Sleeve Thermal T-shirt with Synertech™ technology.

A gray FEATURES tab highlights the advanced Synertech™ thermal regulation and premium merino wool in Hillmans 2BL Merino Wool Base Layer, making it an ideal hunting baselayer.

⚙️ Synertech – the ultimate synergy for moisture control and thermoregulation. Bamboo absorbs, and merino wool evaporates. Together, these 100% natural fibers deliver unmatched, exponentially enhanced performance.
⚙️ Next-to-skin 100% bamboo fiber fabric – absorbs moisture better than any other material on Earth.
⚙️ Exterior of 15.5µm Australian merino wool – the most effective fiber for moisture evaporation and thermoregulation.
⚙️ Keeps you cool in summer and warm in winter.
⚙️ Anti-bacterial, self-cleaning Smart Fabric.
⚙️ CoatsProtect® – antibacterial, anti-odor threads.
⚙️ Seamless shoulders and underarms.
⚙️ Naturally adapts to body shape ergonomics.
⚙️ Anti-crease, 360° resilient fabric.
⚙️ Quick-drying and UV-blocking.
⚙️ Itch-free – gentle on skin and hypoallergenic.
⚙️ Semi-glove cuff with thumb opening.
⚙️ YKK automatic reverse zippers.
⚙️ 360-degree stretch for ultimate comfort.
⚙️ Laser-cut pocket with reinforced zipper.
⚙️ 3D branding.

A gray tab reading TECHNICAL in white capitals, similar to a Hillman 2BL Merino Wool Base Layer-Hunting Long Sleeve Thermal T-shirt | Synertech™ tag, sits with a slight shadow underneath.

Suitable for: men, women, and youth
Activities: Stalking, Driven Hunting, Fishing, Casual/Outdoor
Layer: Base layer [2BL] or Underwear layer [1UL]
Fit: Precision fit - sized to fit over underwear.
Thermal range: from 5°C (41°F) down to -30°C (-22°F) as a base layer or underwear in combination with other layers
Weight: 260 g (Size EU52)
Composition: 48% Merino Wool, 34% Natural Bamboo Viscose, 14% Organic Cotton, 4% Spandex
Care Instructions: Machine wash warm - below 90°F (30°C) with similar colors; do not use bleach or fabric softener. Tumble dry low. Dry away from direct sunlight. Iron medium except for logos.
Warranty: 2-year Warranty - Guaranteed against manufacturing defects.

Gear up with the best hunting baselayer on earth - an embodiment of innovation, comfort, and durability.

Dominate the hunt, equipped with SYNERTECH - technology that exceeds expectations and sets a new standard in the world of hunting apparel.

Purpose-built:

To deliver the world's most advanced thermal regulation system where the bamboo fiber absorbs moisture faster than any other natural material and transports it to the World's finest and most efficient evaporation fiber - 15.5µm Australian merino wool.
Designed to master sweat, moisture, and climate control, it keeps you warm in freezing conditions and cool when the action heats up.

Made to eliminate human odor through the natural anti-bacterial "self-cleaning" properties of both merino wool, bamboo viscose and anti-odor threads.

To increase your efficiency and comfort while hunting and to ensure you wear the highest quality thermal midlayer. Outperforming top competitors by 30% in moisture management, this layer ensures you stay dry, comfortable, and ready for anything the wild throws your way.
For use as the most efficient and technically advanced base layer or underwear for hunting.
Provides perfect thermoregulation during hunting at moderately low temperatures:
from 5°C (41°F) down to -30°C (-22°F) as mid-layer in combination with other layers

Merino-Bamboo-Tights – Proven to be the most effective super-premium hunting base layer in the world.

When you're out in the field, you need gear that performs as hard as you do. That's why we start with the finest merino wool yarns from Australia, weaving 100% natural bamboo fibers into it using advanced interlock technology. This creates a second-skin layer built for ultimate comfort and performance. It's not just thermal underwear - it's your secret weapon against the elements, unmatched in the hunting world.

The underarm and shoulder areas come seam-free, giving you maximum mobility and eliminating spots where bacteria or odor can take hold. Coats' antibacterial and anti-odor threads have your back.
With a built-in semi-glove feature, your hands stay protected from the cold. The ergonomic cut ensures a perfect fit, while the deep front zipper lets you control ventilation as conditions change. The laser-cut phone pocket keeps your essentials secure, and the world-class YKK zippers and precise flatlock stitching ensure every detail is ready for the toughest environments.

For those who demand the best, Hillman delivers. The MERINO-BAMBOO TIGHTS combines world-class fabric with cutting-edge functionality, setting a new standard in the hunting industry - guaranteed to outperform anything out there.

Now it's your turn to favor your body in the best way; we guarantee there's no alternative. If, for any reason, you don't like it - send it back, no questions asked!

Key technologies and functionality:

High-performance hunting tights made from merino wool, designed as a base layer for optimal warmth and breathability.

How did we create the most thermally efficient base layer on Earth?

Defined the 6 Goals:

To develop the world's most efficient natural moisture management technology.
To make a textile that absorbs and wicks moisture from the skin better than any other.
To create chemical-free odor-elimination and antibacterial fabric for hunting.
Design the coziest natural fiber clothing, crafted to be gentle, even on baby skin.
Maximize thermal insulation by using the finest yarns, which trap significantly more air than the thicker yarns used by our competitors.
To deliver a durable, long-lasting material you can trust.

What is SYNERTECH?

The synergistic technology developed by Hillman combines the best functionalities of two or more materials, achieving exponentially higher results than each material used separately. For example, we use bamboo fiber as the most efficient moisture absorber and merino wool as the most efficient wicking fiber.
In comparison, using the materials separately does not allow us to reach such a high-efficiency level for moisture absorption and wicking.

What happens if the clothing is made only of Merino wool?

Even when we use its best quality of 15.5 microns, the Merino wool structure is coarse and can only absorb 30% of its weight in moisture. Nevertheless, it stands out as the most effective moisture-wicking material on Earth.

Practically, if you wear Merino wool, it will effectively manage moderate sweating but may struggle to absorb excessive moisture from your skin, resulting in a wet and sticky feeling on top of your skin. For example, it won't absorb moisture when you are actively running or walking, and you will develop underarm sweat on your skin that takes a longer time to be absorbed.

Furthermore, merino will cause itching on sensitive skin, irrespective of its quality, grade, and origin.

What happens if the clothing is made only of Bamboo viscose?

Bamboo viscose is a natural antibacterial hollow fiber that absorbs moisture three times its weight, three times faster than cotton, and ten times better than wool. It can wick moisture faster than cotton but is less efficient than wool.

odor elimination hunting anti-odor baslayer

For example, bamboo will absorb your sweat much quicker than any other material, but you will still develop sweat spots, which will be fewer than cotton but still exist.
Also, bamboo fiber provides a silk-like, gentle feeling when in contact with the skin. It also allows heavy brushing for superior air trapping, better insolation, and a gentle fleecy feel.

The Final Result

Using natural chemical-free bamboo fiber as the best moisture absorber and the World’s finest possible grade 15.5-micron Australian merino wool as the best moisture-evaporation layer, we have exponentially higher moisture management and thermoregulation efficiency than any other material on Earth. Using the finest grades of materials, the gentle, cozy, itch-free, super functional fabric is now a reality. The plus is that both fibers are naturally antibacterial and anti-odor, making them the best synergy of natural fibers for hunting clothing ever.

merino base layer underwear

COATS PROTECT

the power of anti-odor and anti-bacterial threads

Even if the material is antibacterial, the odor buildup in the underarm threads will always occur if the threads are not treated. This is why we used the one-of-a-kind CoatsProtect® threads to sew our hoodie and achieve the maximum level of odor elimination.

The Hillman 2BL Merino Wool Base Layer-Hunting Long Sleeve Thermal T-shirt features a blue circular logo with COATS in white capital letters under a stylized chain link, showcasing Synertech™ technology for advanced thermal regulation.

With anti-microbe treatment
(Zone of inhibition clearly seen)

Two round petri dishes on a purple background contain white, coiled objects resembling string or yarn, showcasing the intricate design reminiscent of Hillmans SYNERTECH™ technology in the 2BL Merino Wool Base Layer - Hunting Long Sleeve Thermal T-shirt.

Two round petri dishes on a purple background contain white, coiled objects resembling string or yarn, showcasing the intricate design reminiscent of Hillmans SYNERTECH™ technology in the 2BL Merino Wool Base Layer - Hunting Long Sleeve Thermal T-shirt.

Without treatment
(No zone of inhibition)

Two circular glass petri dishes on a purple background hold objects resembling Hillmans 2BL Merino Wool Base Layer Long Sleeve T-shirt with Synertech™ technology, symbolizing innovative thermal regulation in miniature form.

Two circular glass petri dishes on a purple background hold objects resembling Hillmans 2BL Merino Wool Base Layer Long Sleeve T-shirt with Synertech™ technology, symbolizing innovative thermal regulation in miniature form.

It doesn’t matter if you will wear these tights for hunting, hiking, or your daily life; we guarantee top performance, the highest level of comfort, and superb odor control.

Now get the best and most efficient premium hunting baselayer built with the finest materials on Earth that will bring a new level of perfection and definitely enhance your comfort and hunting efficiency.

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GET INTO THE SCIENCE OF MERINO WOOL - THE FIBER THAT’S WORTH IT

Before we made our own, we used to buy all other products out there, all the while wanting different, better clothes to keep us warm in winter and cool in summer. But we still got cold, wet or clammy, not to mention that we’d stink more often than not. After years of research, we were led to an old favorite of our grandparents: wool. It helped keep us warm all winter and remarkably cool in the summer, without the stink. However, that wool wasn’t very comfortable. Then we discovered Merino wool and our world was changed forever.

A split image: left, sheep graze in a frosty winter landscape; right, they enjoy a warm autumn field. See how natures thermal regulation rivals Hillmans Synertech™ 2BL Merino Wool Base Layer-Hunting Long Sleeve Thermal T-shirt technology.

A graphic titled The 12 Functions That Make Merino Wool the Earths Best Fiber highlights Hillmans 2BL Merino Wool Base Layer-Hunting Long Sleeve Thermal T-shirts features: thermal regulation, odor resistance, moisture absorption, quick drying, SYNERTECH™ technology, and SPF protection.

THE KEY FACTORS OF QUALITY AND HOW TO BE ADEPT WHEN BUYING

Merino wool is able to ditch the itch thanks to its fiber’s smaller diameter. The finer fibers are more flexible and softly bend when pressed against the skin, and therefore don’t itch like other wool fabrics. These also enhance the wool’s elastic nature, making garments made with Merino wool more able to conform to the body shape they’re on, enhancing the garment’s performance and the wearer’s comfort.

How we invented the world’s best Merino layers ever made for hunting

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USING THE FINEST WOOL THE WORLD HAS TO OFFER
Our Merino products are the finest that current technology allows. Why do we say technology? Because the superfine merino fibers are extremely difficult to master, we needed novel methods to keep the fibers stable like they are in blends. Hillman’s 15.5 micron Merino fiber is so fine, with a gentle cotton-like touch, instantly offering much greater comfort, far higher functionality, and efficiency for thermal insulation than any other Merino available today.

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CREATING A FLAWLESS BODY MAP SYSTEM
Imagine having an exceptionally warm layer of Merino, and now imagine it doubling under your arms as soon as you retract them to your body. Yes, more Merino doesn’t always make for better comfort, or at least not in this case. The same happens with your thigh area. What about the pant cuffs? Imagine always having to squash them into your boots... Now, do you get what body-mapping is? With the help of our BodyMap technology, you will be equipped with heavier fabric in areas where extra warmth is needed and with a lighter one where mobility is essential.

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IMPLEMENTING TECHNOLOGIES FOR COMFORT
In order to create our clothing versatile, valuable and true to its purpose, we implemented various technologies throughout the process. From flat seams, thumb holes, pockets, and others to superb seamless sewing, stretch zippers, and heating system integration, it’s a process that we’ve been developing for years. Today, we can, without a doubt, declare that our Merino layers will bring you new levels of comfort, functionality, and satisfaction since they’re invented exclusively with you in mind.

Hunting Base Layer Bottoms | Long Johns

2BL Merino Wool Hunting Long Johns-Thermal Base Layer Pants