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Merino Hunting Base Layer Bottom [2BL] Synertech® Long Johns Thermal Underwear

Size Guide
Size Guide
Free Shipping| Delivery 3-5 days
Orders placed by 2 PM ET ship the same day

⚙️ 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.
⚙️ Naturally adapts to body shape ergonomics.
⚙️ Anti-crease, 360° resilient fabric.
⚙️ Quick-drying and UV-blocking.
⚙️ Itch-free – gentle on skin and hypoallergenic.
⚙️ 360-degree stretch for ultimate comfort.

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: 9.2 oz / 260g. (Size US36 | 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 logos.
Warranty: 2-year Warranty - Guaranteed against manufacturing defects.





Gear Up with the Best Merino Wool Hunting Base Layer Bottoms

Equip yourself with the best Merino wool hunting base layer bottoms on earth—an embodiment of innovation, comfort, and durability. Dominate the hunt with SYNERTECH technology that exceeds expectations and sets a new standard in the world of hunting apparel.

Purpose-Built Thermal Regulation System

Our hunting thermal underwear is purpose-built to deliver the world's most advanced thermal regulation system. Bamboo fiber absorbs moisture faster than any other natural material and transports it to the world's finest and most efficient evaporation fiber—15.5 µm 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.

Natural Odor Elimination

Eliminate human odor through the natural antibacterial "self-cleaning" properties of Merino wool, bamboo viscose, and anti-odor threads. This ensures you stay undetected and comfortable during your hunt.

Increase Efficiency and Comfort

Outperforming top competitors by 30% in moisture management, this layer ensures you stay dry, comfortable, and ready for anything the wild throws your way. It's the best thermal underwear for hunting, increasing your efficiency and comfort while ensuring you wear the highest quality thermal base layer or underwear.

The Most Efficient Base Layer for Hunting

Use it as the most efficient and technically advanced base layer or hunting long underwear. It provides perfect thermoregulation during hunting at moderately low temperatures—from 5 °C (41 °F) down to -30 °C (-22 °F) as a base layer in combination with other layers. It's the best base layer for extreme cold hunting, ensuring you remain warm and agile.

Merino-Bamboo Pants: Proven Super-Premium Hunting Base Layer

The Merino-Bamboo Pants are 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. 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 hunting long johns—it's your secret weapon against the elements, unmatched in the hunting world.

Hillman Delivers the Best Long Johns for Hunting

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

Satisfaction Guaranteed

Now it's your turn to favor your body in the best way; we guarantee there's no alternative. If, for any reason, you're not satisfied, 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?

We defined six goals:

  • Develop the world's most efficient natural moisture management technology.
  • Create a textile that absorbs and wicks moisture from the skin better than any other.
  • Produce chemical-free odor-elimination and antibacterial fabric for hunting.
  • Design the coziest natural fiber clothing, gentle even on baby skin.
  • Maximize thermal insulation using the finest yarns, trapping more air than competitors.
  • Deliver a durable, long-lasting material you can trust.


What Is SYNERTECH?


SYNERTECH
is the synergistic technology developed by Hillman that combines the best functionalities of two or more materials, achieving exponentially higher results than each material used separately. By using bamboo fiber as the most efficient moisture absorber and Merino wool as the most efficient wicking fiber, we reach an unparalleled level of efficiency in moisture absorption and wicking.


Why Not Just Merino Wool?

Even when we use the finest 15.5 µm Merino wool, it can only absorb 30% of its weight in moisture. While it's the most effective moisture-wicking material on Earth, wearing Merino wool alone may struggle to absorb excessive moisture during high activity, resulting in a wet and sticky feeling. Moreover, Merino wool can cause itching on sensitive skin, regardless of its quality.

merino wool hunting
Merino wool electron microscope image

Why Not Just 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. However, while bamboo absorbs sweat quickly, you may still develop sweat spots, albeit fewer than with cotton. Bamboo fiber provides a silk-like, gentle feeling when in contact with the skin, allowing heavy brushing for superior air trapping, better insulation, and a gentle fleecy feel.
odor elimination hunting anti-odor baslayer
Bamboo fiber electron microscope image

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

Synetrech® fabric manages moisture 30% faster and more efficiently than any other natural fabric on Earth.

By combining natural, chemical-free bamboo fiber and the world's finest 15.5 µm Australian Merino wool, we achieve exponentially higher moisture management and thermoregulation efficiency than any other material on Earth. The result is a gentle, cozy, itch-free, super-functional fabric. Both fibers are naturally antibacterial and anti-odor, making them the best synergy of natural fibers for hunting clothing ever.



COATS PROTECT

The power of anti-odor and anti-bacterial threads

Even if the material is antibacterial, odor buildup in the threads can occur if they are not treated. That's why we used the one-of-a-kind CoatsProtect® threads to sew our tights, achieving the maximum level of odor elimination.

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


Without treatment
(No zone of inhibition)


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.


Guaranteed Performance in All Conditions

Whether you're hunting, hiking, or going about 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 base layer built with the finest materials on Earth, bringing a new level of perfection and enhancing your comfort and hunting efficiency.


Looking for the Best Merino Wool Hunting Base Layer Bottoms?

Our premium thermal long johns underwear is crafted from the finest Merino wool and purest bamboo fibers, providing exceptional warmth, breathability, and moisture-wicking properties essential for cold weather hunting. These hunting long johns are designed to keep you comfortable and dry, making them the best long underwear for hunting. With natural odor resistance and a snug fit, our Merino hunting base layer is the ultimate thermal underwear for hunters who demand the best from their gear.

Enhance Your Hunting Experience

By choosing Hillman's Merino-Bamboo Tights, you're investing in the pinnacle of hunting apparel technology. Experience unparalleled comfort, performance, and efficiency that will elevate your hunting experience to new heights.

Order Now and Experience the Difference

Don't settle for less. Equip yourself with the best hunting base layer available. Order now and take the first step towards a more comfortable and successful hunt.

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

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.


merino midlayer microns



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