Our quest for the ultimate Performance T-Shirt kicked off during our training for "Marathon des Sables Cappadocia" a 120km self-sufficient 4-day race. Our non-negotiable goal? An "invisible smell" T-Shirt. Because, let's be honest, four days without a shower on the trails can get a tad itchy for everyone's nose!

We explored every material under the run and sun, from next-gen synthetics to bio-based fabrics. When those didn't quite hit the mark, we looked way back. How did our ancestors survive 6,000 years ago in the desert before modern tech? The answer was simple: Merino Wool. 

This natural fiber delivered everything: incredible temperature regulation, anti-odor magic (yes, that no-smell wish truly came true!), and great moisture management. We tried it, were instantly hooked, and from that moment, embracing merino was a no-brainer.

Now, merino, like any natural wonder, has its unique characteristics. It doesn't like a hot tumble dryer, and it could possibly shrink if you toss it in. Over time, you might notice some minor pilling, or a slight "twist" or "skew" at the seams (that just means the fabric's natural movement makes the edges look a bit uneven, but a good iron usually sorts it right out!).

These "quirks" led some fabric scientists to explore blending merino with synthetics like polyester or nylon. The idea? To enhance durability, reduce shrinkage, and generally make it "less of a pain in the ass to look after." And, to a degree, they succeeded, especially when considering the price factor!

But here's the kicker: while some brands blend Merino with synthetic fibers, those blends come with compromises. You lose:

• The incredible natural odor resistance.
• A little bit of its thermo-regulation magic.
• That premium, soft-to-the-touch feel.
• The pure, natural appearance.

For us, at Invisible Company, the pure performance, natural feel, and inherent sustainability of 100% merino outweigh any perceived "quirks." We believe these characteristics are part of its authentic, nature-engineered charm – a performance secret that's been proven for millennia, long before modern fabrics even existed. We're all about letting nature do its best work, uncompromised. With the undeniable benefit of a 100% natural fiber that’s biodegradable and recyclable. So, for the Invisible x The Peak Hunter collection, going 100% Merino became our clear path forward.

What makes Merino truly magical, especially for those long, sweaty trail runs? It all comes down to the fiber's incredible natural engineering. After all, humans have been trusting Merino Wool for millennia, recognizing its unmatched performance long before modern fabrics.

Super-fine merino wool is a protein-based fiber – specifically, keratin, just like your hair. It’s a total genius on a molecular level; each fiber’s natural crimp traps air, creating insulating pockets for exceptional thermoregulation. Its “dual nature” also gives it incredible moisture control—the fiber feels dry on the outside, yet absorbs moisture vapor from your skin.

Thermo-regulation: That crimp – a tiny coiled fiber – traps air, creating insulating pockets. And because air is a terrible heat conductor, merino becomes an exceptional thermoregulator. It's why this tee keeps you warm in winter and surprisingly cool in summer, instinctively preserving your body temperature. Consider nature's smart A/C climate control for your body.

Moisture Control: Here's the cool part: the fiber's outer layer is hydrophobic (it repels liquid water, thanks to a natural waxy layer), while its inner core is hydrophilic (it loves and absorbs moisture vapor). This "dual nature" means it feels dry on the outside, yet can absorb a whopping amount of moisture from your skin. No more sticky discomfort!

Elasticity & Bounce: Merino's keratin protein structure also gives it amazing elasticity. Think of it like a natural coil or spring – it retains its shape, moving with you mile after mile. That's the super interesting science that keeps you comfortable.