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Materials & Quality· September 15 2026· 6 minutes read· By Nicole Hoefsmit

7 Fun Facts About Merino Wool

Discover 7 surprising facts and properties of merino wool. From its itch-free softness and temperature regulation to the self-cleaning properties and durability of this luxurious natural fiber.

Short answer

Why are we at Plein Publique so passionate about merino wool? In these 7 fun facts about wool, you’ll discover all the unique properties of this amazing material—from itch-free softness to natural temperature regulation and self-cleaning properties!

Fiber
Super-fine & therefore itch-free
Features
Temperature-regulating, breathable, and moisture-wicking
Self-cleaning
Resists bacteria and odours thanks to natural lanolin
Sustainability
100% natural, renewable, and biodegradable

PLEIN PUBLIQUE ❤ MERINO WOOL

Merino wool: we at Plein Publique just can’t get enough of it. And our numbers show that you’re a big fan, too! Merino wool is warm, soft, low-maintenance, and—last but not least—stylish, timeless, and absolutely gorgeous. We’ve put together a list of 7 fun and useful facts about merino wool. To keep your love for merino wool alive, and to give you the chance to fill in your clueless friend/sister/mom/coworker—after all, everyone deserves a love like that, right? And oh yeah, also to keep our colleague in charge of the numbers happy (Don’t f*** with Patries—she pays our salaries. Kisses x)

*Wondering why we’ve gathered exactly seven—and not 10—facts for you? There are seven beauties, seven wonders of the world, seven deadly sins, seven pillars of wisdom… as far as we’re concerned, this list fits right in :-).

1. MERINO WOOL DOESN’T ITCH

A sheep with shaggy white wool, a black face, and black ears.

There’s a reason we’re mentioning this first: we scratch where it itches the most. The idea that wool is itchy is the biggest misconception about this wonderful natural product. But… just as no two people are the same, no two types of wool are the same either. If your skin is sensitive to wool, that doesn’t mean you can’t wear any type of wool at all. You just need to know what to look out for. As a general rule, wool from sheep in colder regions has a stiffer and thicker texture, which makes it itchier. For non-itchy wool, the same rule applies as for house prices: location, location, location.

The Merino sheep is native to Spain, and that warm climate is “hard-wired” into the genes of today’s generation of Merino sheep. Merino wool is now primarily harvested in regions with a similar climate, such as Australia and New Zealand. The wool “fiber” (which is actually hair) is longer, smoother, and finer, and therefore itches far less than, for example, Shetland wool, whose hairs are nearly four times as thick. The Shetland Islands are located somewhere between Scotland and Norway, so you can see why. When you choose merino wool, you’re choosing fine, soft, non-itchy wool.

2. MERINO WOOL IS SELF-CLEANING

Wow. That’s pretty amazing. Merino wool is naturally antibacterial and self-cleaning. Wool owes these properties to the layer of fat that coats each fiber. That layer of fat is called lanolin, and it’s what makes wool unique. Great stuff :-). The lanolin inhibits the fiber’s ability to absorb moisture and dirt, which remain on the surface rather than being absorbed into the fiber. The antibacterial effect comes from the proteins in the lanolin: they break down bacteria, thereby neutralizing odours.

Musty-smelling merino wool improves dramatically when you hang it outside to air out for a few hours. Especially in the fog, but the bathroom after a shower (indoor fog) also works wonders. Odours disappear like snow for the sun. Adieu, wet dog smell.

A dark amber Plein Publique Carte Blanche Garment Spray bottle on a light, fringed blanket, with driftwood and sand in the background.

*Stubborn aftereffects of a garlic-laden feast? Spray your wool with our scented fabric spray to give your outdoor refresh an extra power boost.

3. MERINO WOOL IS MACHINE-WASHABLE

A smiling woman wearing a black jacket, a striped shirt, and jeans runs her hand through her dark hair.

Duh. Of course you can wash merino wool in the washing machine. Just open the door and pop it in. But is it okay to actually turn the machine on like usual? What will it look like when it comes out of the wash? Like a felted pouf or a wad of steel wool? Don’t worry—if you follow the basic rules, you’ll be just fine. In principle, you don’t need to wash merino wool—just check out tip #2. But what if there’s a stain on your merino wool sweater? It won’t disappear on its own while airing it out, so sometimes you just can’t avoid using the washing machine. We’re happy to direct you to our FAQ on merino wool, where you can read all the ins and outs.

4. MERINO WOOL IS SUSTAINABLE

Okay, there’s sustainable and then there’s sustainable. These days, the term is thrown around left and right, and it’s not always clear exactly what it means. Unfortunately, sustainability has become a hollow marketing term. What we mean in this context is that merino wool lasts a long time. If you take good care of a merino wool garment, you’ll enjoy it for years to come. You won’t need to replace it with a new one for quality reasons, which automatically helps you “consume less” and thus prevent unnecessary strain on the environment.

Because no matter what fashion brands’ sustainability claims may say, even a responsible production process leaves its mark. The sustainability we’re referring to here is directly related to the lifespan of your merino wool garment, and you can maximize that lifespan by carefully following the washing and care instructions.

5. MERINO WOOL IS RECYCLABLE

A woman wearing a light pink long-sleeved top with puff sleeves, posing with her hand on her head.

You see it more and more these days: clothing made from recycled materials. Or clothing made using scrap materials, dead stock (leftover inventory), or second-grade items. In the case of wool—and therefore merino wool as well—this primarily involves the “fiber-to-fiber” method. Collected clothing and/or unsellable surplus stock from fashion brands are sorted, shredded, and reduced to fibers.

Yarn is then spun from these fibers, which can be used to produce new garments. In this way, the product remains within its own category of use— consumer textiles stay consumer textiles —rather than being drawn into a downward spiral toward lower levels of the supply chain (e.g., from consumer textiles to underlayment or insulation material).

Pure merino wool is ideally suited for this type of recycling—as for blends with other fibers, the industry is actively seeking the best way to separate the different fiber types in order to recover a pure base product from which new products can be made.

6. MERINO WOOL IS SUMMER-PROOF

A woman wearing a beige turtleneck and light-wash wide-leg jeans is sitting on a stool, looking down with her eyes closed.

Wool is known for keeping you warm. That’s because wool fibers are crimped: the tiny “air pockets” in the knit or woven fabric provide excellent temperature-regulating properties. This open structure also ensures that moisture (including sweat) evaporates easily. The layer of wool grease surrounding each fiber also prevents moisture from penetrating the fiber.

Merino wool breathes, just like your skin, so if you choose a lightweight, finely knitted merino wool garment in the summer, it will feel just as cool and comfortable as cotton of a similar weight. The more you know…

7. MERINO WOOL PROMOTES SLEEP

Finally, here’s a fun fact we’d like to share with you just for the sake of it. The University of Sydney conducted a study on students’ sleep patterns. It found that students in their early twenties fell asleep 4 minutes faster when wearing merino wool pajamas. By comparison: when dressed in merino wool, they fell asleep within 11 minutes; when dressed in cotton, it took 15 minutes before they drifted off. “Getting under the wool” takes on a whole new meaning :-)

What’s the point of this tidbit? None for us—just consider it a fun fact. Pajamas aren’t on our to-do list just yet.

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FAQ

Why doesn't merino wool itch against bare skin?

Merino wool has a much thinner and softer fiber structure than regular wool. As soon as the fiber touches the skin, it flexes smooth instead of pricking into it.

How do merino wool's self-cleaning properties work?

Merino wool naturally contains lanolin (wool grease). This has antibacterial and odour-repelling properties, preventing dirt and unpleasant odours from penetrating the fabric; simply airing it out outdoors is often enough.

Is merino wool suitable for all seasons?

Yes, merino wool regulates body temperature. It provides a layer of insulation against the cold in winter, but breathes and wicks away moisture on warmer summer days.