FAQ About Merino Wool

Merino sheep in the Mountain West, USA

Wool is a super fiber. It’s a game-changing material made in the USA which puts cotton to shame again and again. Here, we’re answering common questions about wool and why we believe it’s the best material to make socks out of.

Does wool keep me that much warmer?

Wool is second only to goose-down in insulation ability. It will help keep you warm in extreme conditions as well as wick moisture from your skin, so if you plunge into water or get caught in the rain, you’ll dry off faster.

 Woman putting on wool socks in car

Can I wear wool in the heat?

Because of its moisture-wicking properties, wool is great for activities where you’ll be sweating. But the best way to describe wool is being like a styrofoam cup. It keeps hot drinks hot and cold drinks cold, insulating the temperature of the thing it surrounds. Wool does largely the same thing. 

Wool has “heat of sorption” properties, which means it holds onto heat when it’s cold and releases heat when it’s warm. Tiny pockets in the fibers fill with air to insulate you, keeping your skin a steady temperature. 

And, when you sweat, the water vapor won’t stay on your skin. Instead, the wool moves the water through the core of the fibers and then releases it into the air, keeping your feet dry even on a hot day.

What happens when I sweat in Merino wool?

Nothing! That’s the beauty of it. Merino wool absorbs liquid right off your skin, and can absorb more than 30% of it's weight before it begins feeling damp. And, even when it’s wet, it retains 80% of its insulation ability

The fibers in the wool are hydrophilic, meaning they attract water. The water vapor from your skin moves into the core of the fibers and then evaporates into the air, keeping you and the wool dry to the touch. Wool releases water much more quickly than other fibers, making it a superior moisture-wicking fabric.

What's the difference between Merino and Rambouillet wool? 

Merino wool comes from the Merino breed of sheep, which are known to withstand very extreme temperatures. In America, we get a similar type of wool from a sheep called Rambouillet sheep, which is essentially a cousin to the Merino. 

Rambouillet sheep have wool coats that can keep them warm in below freezing environments and cool on hot summer days. Rambouillet wool is unique because it performs so well in a variety of circumstances, which the sheep themselves can attest to. 

Merino and Rambouillet wool are the thinnest wool fibers available. The fibers are long and strong (even stronger than silk!) which helps it withstand tearing and ripping.

Rambouillet sheep in particular have coats that produce a long staple length, resulting in a softer, finer material. Rambouillet sheep's coats also have a natural crimp, meaning it can be molded and shaped more easily.

All in all, the Rambouillet is a fantastic close cousin to the Merino, giving Americans a domestic wool source.


Couple running in the mountains together

Does Merino wool last longer than other fabrics?

Yes. Wool can bend 20,000 times before it breaks, but cotton can only bend 3,000 times. This makes wool a more durable fabric overall. 

However, in order to make wool last longer and be more flexible, most companies mix other fabrics into their wool blend. At GRIP6, we use a mix of wool, nylon, and elastic to create the best sock possible. Synthetic materials last even longer than wool, making the blends a super durable fabric.

Is wool itchy?

Depends on what you get. Merino wool’s fibers are long and thin, making them smooth and comfortable against the skin. Other wool variations, like the ones used in thickly-knit sweaters or blankets, feel different against the skin than our socks. 

Blending other fibers with wool is a common way to make the fabric smooth and soft.

Standing with Wool socks photo of shoes and socks

Is it true that wool eliminates odors?

Yes. Merino wool is great for masking odors because of its antibacterial properties. This makes it perfect for long days on the trail or just re-wearing your favorite socks a few times. 

Because of the moisture-wicking properties, wool keeps your feet from sweating and forming odors that way.

You can go more times between washing, making wool a great water-saving option.

Is Merino wool less harmful for the environment than other fabrics?

Compared to many other fabrics and fibers, Merino wool is a better choice for the environment. 

Starting with waste and pollution, Merino wool is overall much better. It only takes six months for merino wool to break down, which is a big difference compared to the multiple centuries that other materials spend breaking down. 

Wool is a renewable resource, because wool from the same sheep is shorn year after year as long as the sheep lives. This is far better than synthetic materials, which are made from nonrenewable resources. 

Because wool comes straight from the animal, it does not contain microplastics and therefore does not release plastics into the ocean. Microplastics are a major problem caused by synthetic materials, and the use of wool rather than other materials is a great option to help reduce these harmful effects. 

Here in the mountain west, sheep are being used to help mitigate fires and reduce the risk of massive wildfires spreading. Through targeted grazing, sheep eat dry grass before it becomes a fire danger. 

Overall, the net environmental cost of using wool for socks is much less than using other materials. 


Wool Machinery

Pictured above: our sock machine under the glow of the night lights when the manufacturing facility is closed up for the day.  

Is wool flammable?

No. Wool requires more oxygen than is present in the air to catch on fire, so you don’t have to worry about your merino wool products being flammable unless you throw them directly into a fire. 

Our socks are fire-resistant, because the materials that aren’t wool can catch fire.

How do I clean merino wool?

The same way you’d clean anything else, it’s just much easier. Wool fibers overlap, which keeps dirt, dust, odors, and anything else you don’t want in your clothes on the surface, so it’s easier to clean. That’s why our socks are built to get dirty!

Wool washes well in cold water and dries with low heat. You can wash your wool products less frequently because they do not hold odors easily. For best results, we recommend washing your socks inside out. 

Man running through mud with wool socks on

What should I do when my merino wool products wear out?

Many companies recycle wool, so we recommend checking what’s available locally so you can drop your products off to be recycled.

If your wool socks are from GRIP6 and they get damaged, you can submit a request to have a new pair sent to you! Email grip6@grip6.com with an image of the problem and your order number, and reap the benefits of our lifetime guarantee!

Why are our products not 100% wool?

Integrating nylon and elastic allows our products to be more comfortable, last longer, and have better elasticity. It also makes the sock more comfortable and wearable for everyday use.

We have also found that 100% wool products are much more expensive than products crafted with a mix of materials. Because we like to keep products within a reasonable price range for consumers, we chose a blend of wool instead.

Where does GRIP6 wool come from?

All GRIP6 wool is sourced from the Mountain West. The wool is shipped to our manufacturing facility in Salt Lake City, Utah where the socks are made in-house.

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I tried wearing one of son’s belts, really liked it so ordered some for myself. While I was about it I ordered two pairs of socks & love them. I’m planning to order some more of them very soon. Would definitely recommend them to everyone.



I bought some of your socks, because I loved the belts so much and figured to give some other product a try. Best socks I ever owned. They feel great and fit perfect. I don’t like the colors that much (no solids) but they feel so good, I don´t care. You guys rock!

Matthew Wayne Harris

Matthew Wayne Harris

I’ve been doing a little research,but always come up with different or conflicting answers.

My question is this: how many time do y’all recommend Grip 6 socks to be worn before washing??

I worn all my first pairs 3 times eacch around the yard and house (per Grip 6 recommendations). This seemed to work fantastic after washing and hand drying.

But what about during normal use?? Whenever I wear a pear during really gnarly climbs & backpacking, or during hot summer work days in knee high Muck boots, I washing things every time (even tho they never stink I still do it out of habit [I just air dry mostly during backpacking])….. Meanwhile if I’m just around home, in town, or right around with my girlfriend, I wear them 2-4 time depending…..

So what do you amazing people at Grip 6 recommend??

{P.S amazing products as always guy!! Life long fan, advocate, and customer here my friends!!!}

Michael Vögele

Michael Vögele

Hallo, wo kann ich die Socken bestellen?



bought the largest sock you had and t hey barely fit. I am a size 13. Gave them to my wife and they fit her fine. she is a size 8.
I was very disappointed.

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