The Best Fabric for Outdoor Apparel? It’s Already in Your Closet

Even with all the breakthroughs in synthetic fiber technology, natural fibers are king.

a man wearing a black and white tie dye wool shirt Smartwool

Innovation and progression are popular buzzwords to describe outdoor gear. Each new product release is positioned as a breakthrough, an innovation or a monumental step forward in the world of hiking boots, technical outerwear, ski gear and more.

But in this innovation arms race, classic materials like wool hold their own. In fact, I’d go a step further to say that wool remains the best material for outdoor apparel.

I’m not alone: brands like Filson, Icebreaker and Arc’teryx have dedicated themselves to producing high-end, quality wool products that will stand the test of time. This is why.

Wool is naturally insulating

Sheep grow wool as a natural protective barrier against cold (and heat, but we’ll get to that later) and it’s hard to argue with the logic of nature. Wool insulates so well thanks to its structure: each wool fiber is composed of protein molecules, which trap air and moisture, keeping skin temperature stable.

Because it’s breathable, wool allows moisture vapor to escape while retaining heat. Unlike cotton, which traps moisture against the skin and in turn makes you feel colder, wool can absorb more than 30 percent of its weight before it becomes damp, making it an ideal material for baselayers.

A common misconception with wool is that it’s only for cold temperatures. Wearing a thin layer of wool on a hot day can actually help you beat the heat.

A common misconception with wool is that it’s meant to be worn only in cold temperatures. Thick, wool will overheat you in warmer temperatures. However, wearing a thin layer of wool on a hot day can actually help you beat the heat. Wool is moisture-wicking, quick drying and helps regulate skin temperature; these are all qualities you’d want in a summer sun shirt.

Wool is naturally antimicrobial and odor-resistant

Wool’s unique cellular structure comes with a laundry list of benefits, including its natural antimicrobial qualities and odor-resistance. Wool’s fibers have a distinctive overlapping structure which sort of acts like shingles on a roof — the overlap keeps dirt and moisture on the surface, which helps to combat the bacterial or microbial growth which produce unpleasant odors.

Wool is durable and long-lasting

There’s a reason many folks have wool blankets or jackets handed down from grandparents and parents that they still use, and it’s not because previous generations were overly-cautious with their wool products. It’s because the fiber is durable and long lasting, and when constructed properly into a garment or blanket, can last for generations.

According to American Wool, there’s science to back up these anecdotal hand-me-downs: “Wool items last because wool fibers can bend up to 20,000 times before breaking. This durability far surpasses other fibers, making wool tough to tear and resistant to abrasion.”

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