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  • The all-new ULTRA Merino 120 LT answers KUIU’s never-ending challenge of reducing weight, while improving durability.

    KUIU partnered with Nuyarn® to engineer a fabric that was lighter than the 125 g/m² predecessor, yet stronger. Without sacrificing natural softness, comfort, and performance, the new 120 g/m² fabric uses a thicker nylon yarn core, creating higher dimensional stability, improved regain, and added durability. The result is the lightest and toughest in the industry—the ULTRA Merino 120 LT.

    Merino wool as a natural fiber excels at thermoregulation and odor resistance, these are key performance factors for long-duration hunts. At KUIU, we source the finest quality Merino wool from New Zealand, targeting a 17.5-micron fiber diameter for itch free comfort. We do not use chemical softeners that wash off over time.

    The Nuyarn technology is not a synthetic blend, the wool fibers surround a core of high-strength nylon. You get the benefits of 100% Merino next to skin, but with a highly durable synthetic at the core of the yarn.

      Combining the low reflectivity of Merino with a camouflage print can really help you go undetected at close contact range. Through years of continuous improvement, our camouflage print fabric is just as soft as our solids, with colorfastness that will last for years.

      At KUIU, we truly build our Merino to a higher standard, from the fiber to the yarn, and outward to the fabric and the print. It’s the lightest, strongest, and highest performing Merino on the market.

    • Inseam: 26.75 in / 68 cm
    • Zip-off design for easy on and off without removing boots
    • Crotch gusset for added comfort and reduced chaffing
    • Low-profile elastic waist with hook & loop closure
    • Functional fly
    • Anatomical shaping for fit and comfort
    • Flat lock seams for added comfort
    • Nuyarn Merino Wool 120 g/m²
    • 70% Merino / 30% Nylon
    • 17.5 micron New Zealand Merino wool
    • YKK zippers

    Built-In Technology

    Nuyarn by The Merino Company

    As good as traditional merino was, Nuyarn is better. Classic yarns twist fibers together for strength, which leaves ends poking out that can cause irritation. Nuyarn takes the twist out, and instead, lays fibers along the same orientation, so fabrics feel less prickly and more comfortable. By eliminating the spun yarn, we get merino wool that has more loft, stretch, and durability.

      ULTRA Merino 120 LT Zip-Off Bottom

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      5.5 oz / 156 g

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      Layering Position

      Base Layer

    ULTRA Merino 120 LT Zip-Off Bottom | Stone

New ULTRA Merino 120 LT

The all-new 120 LT Series answers KUIU’s never-ending challenge of reducing weight, while improving durability. Now available in Hoodie, Long Sleeve, Short Sleeve, and Zip-off Bottom styles.



As good as traditional merino wool was, Nuyarn® Merino is better. Conventional ring-spun and core-spun yarns twist the wool fibers into a rope-like structure, which restricts the natural performance benefits. With Nuyarn technology, the wool fibers are drafted over a high-strength nylon filament. You get the benefits of 100% Merino next to skin, with faster dry time, more stretch, tougher seams, added loft, and improved thermoregulation.


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