Gear Up with Earth's Best Merino Wool Hunting Base Layer - 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, this merino-bamboo hunting base layer combines 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, it’s designed to function as:

• The ultimate base layer or next to skin hunting underwear.

• A lightweight outer bamboo-merino wool hunting t-shirt in warmer weather.

Perfect for thermoregulation in a range of conditions:

• 5°C (41°F) to 15°C (59°F): Ideal as an outer layer or used over your base layer.

• 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 Base Layer - 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. This isn’t just thermal underwear—it’s your ultimate defense against the elements, unrivaled in the hunting world.

Seam-free underarm and shoulder areas provide maximum mobility while eliminating spaces where bacteria and odor can linger. Combined with antibacterial and anti-odor threads, this base layer keeps you fresh no matter how intense the hunt gets.

The built-in semi-glove feature shields your hands from the cold, while the ergonomic cut ensures a flawless fit. A deep front zipper allows you to adjust ventilation on the fly, and the laser-cut phone pocket keeps your essentials secure. Every detail, from the premium YKK zippers to the precision flatlock stitching, is built to withstand the toughest conditions.

For those who refuse to settle for less, Hillman delivers. The Merino-Bamboo Long Sleeve Thermal T-shirt 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!

⚙️ 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.

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 10°C (60°F) to 20°C (77°F) as an outer layer over the base layer
from 5°C (41°F) down to -30°C (-22°F) as mid-layer in combination with other layers
Weight: 360 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.

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.
  
  

SYNERTECH All-Season System - Engineered to Master Heat, Cold, and Everything Between

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, we can't reach such a high efficiency level for moisture absorption and wick by using the materials separately.

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.

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-wicking layer, we have exponentially higher moisture management and thermoregulation efficiency than any other material on Earth. By using the finest grades of materials, the gentle and 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.

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.

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

Without treatment
(No zone of inhibition)

 

Designed with seamless shoulder yokes, the hoodie will bring extra comfort when carrying a backpack or rifle.

It doesn’t matter if you will wear this hoodie 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.