100% Wool Fabric Weights - Minus33® Merino Wool Clothing


At Minus33, we offer three distinct fabric weights for all-season adventures. Which one you choose will depend on a few factors: how active you are, what the weather/temperature is doing, how easily your body gets cold/warm, and the other layers you plan to wear. Use this chart below as a reference, but always keep in mind the changing environment. Low activity is considered little to no physical movement, such as treestand hunting, while high activity is considered constant movement, such as running or hiking.

Temperature recommendations (°F) vs. Activity Level


We believe that wool is one of the best fibers in the world, so we strive to bring you products made with as much wool as possible so you can reap all the benefits of its all-natural advantages on your outdoor adventures.


Our 100% Wool collection is made from superfine, soft merino wool so you can be 100% Prepared for anything.

Shop the 100% Wool Collection
  • Lightweight

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    • 170 g/m2 Jersey Knit
    • 17.5 Micron Merino Wool
    • UPF Rating 25

Merino Wool is no longer reserved for Winter. Minus33’s Lightweight clothing is designed to be worn year round as a base layer or as a solo piece in the spring and summer.


Our incredibly soft Merino Wool provides great temperature regulation with its natural moisture wicking technology. Merino Wool is naturally odor resistant and our machine washable/dryable easy care instructions make cleaning a breeze.


Whether you’re hiking the mountains in the spring or rock climbing in the summer, our Lightweight product should never leave your back. Our Lightweight items are always the first layer on and the last layer off.

  • Midweight

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    • 230 g/m2 Interlock Knit
    • 18.5 Micron Merino Wool
    • UPF Rating 50+

Versatile and comfortable, our Merino Wool will always have your back. Designed as a three-season garment, our Mid-weight works great as either a base or mid layer.


Our Midweight styles have all the same natural qualities as our Lightweight Merino Wool, with greater insulation. Minus33 Merino Wool Clothing is perfect as a base layer for a day on the slopes or as an emergency pullover when a cold front rolls in just before you summit.

  • Expedition Weight

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    • 400 g/m2 Interlock Knit
    • 18.5 Micron Merino Wool
    • UPF Rating 50+

On the coldest, darkest nights, you will discover yourself seeking the warmth of Minus33 Merino Wool. Our Expedition products are suitable for the coldest climates and true expeditions.

Originally designed for winter mountaineering on Mount Washington, Minus33 Expedition Weight clothing has seen action in both the Antarctic and Arctic, and even to the Summit of Mount Everest.

Anyone venturing out in the cold will greet our Expedition clothing with a warm welcome as either a base, mid or outer layer. When you need to keep the ever-present cold from seeping in, our Expedition items will be your best friend.