Merino gets asked a lot of questions. Is Merino good for summer? Is Merino warm? Is Merino too warm? Will Merino shrink the first time you wash it? Is Merino worth the price tag? We get it, and we respect it. You're just doing your homework. We sure did ours.
So, we've pulled all your dirty burning questions into one place: the Great Merino Wool FAQ. Read on for everything you need to know about Merino wool.
1. What is Merino wool, and where does it come from?
Merino wool is a fine, natural fibre wool that comes specifically from Merino sheep: a badass mountain breed that weather the elements and roam the valleys and ridgelines come rain, snow or shine. Merino wool is prized for its fine, soft fibre, running as fine as 15–24 microns and landing at roughly a third the width of a human hair. Not all wool is Merino: regular wool comes from a range of sheep breeds and is generally thicker, coarser, and itchier. Think more carpets and heavy sweaters than anything worn against the skin.
All our wool comes from New Zealand and Australia, where the cool climate and high-country grazing produce some of the finest fibre in the world. The majority of that comes from our Growers Club: eight Merino stations in the Southern Alps of New Zealand – just around the corner from our HQ in Wānaka.
2. What is ZQ and ZQ+ Merino?
Wool that is ZQ certified through Zentera means it comes from independently audited farms that meet some of the world's most demanding standards around animal welfare, environmental stewardship, social responsibility and wool quality. All ZQ wool is traceable back to the farm where it was grown, is hand-classed and is independently tested for key attributes like fibre strength, micron, colour, yield and style.
ZQ+ certification goes even further, building on the above as well as supporting measurable improvements to the environment. ZQ+ growers use regenerative farming practices that strengthen soil health, protect native ecosystems, support biodiversity, improve greenhouse gas sequestration and enhance long-term environmental resilience. All our wool is ZQ, ZQ+ or RWS (Responsible Wool Standard) certified.
3. Is Merino wool itchy?
No, Merino wool is not itchy. The itch reputation belongs to Merino's average Joe cousin: regular wool. Think your Grandma's woolly sweaters. Standard wool fibres are coarser, thicker, and stiffer, which causes that prickly feeling against the skin. Merino's ultra-fine fibres bend easily against the skin instead of poking it, which is why it's the go-to for base layers worn directly against skin.
4. Does Merino wool shrink?
No, Merino wool doesn't shrink if you wash it correctly. It can, but it's all about how you wash it, not the fibre itself. Heat and agitation cause wool fibres to felt and tighten, so we recommend washing according to your garment instructions, as care can vary a little depending on the blend and material construction. Check out our Merino care guide for more information.
5. How do you wash Merino wool?
Generally speaking, wash your Merino wool garments using a cold-warm machine wash (<30°C) on a regular cycle. Turn your garment inside out before washing, and wash with like colours. Use mild detergent, and don't use fabric softener – it clogs the fibres and reduces performance. Lay it flat or line dry it in the shade rather than tumble drying. Always follow the specific washing instructions on your garment, as care can vary slightly between blends and materials. Head to our Merino care guide for more information.
Because Merino is naturally odour-resistant, you'll also find you need to wash it less than synthetics. Good for the garment, good for your laundry pile.
6. Is Merino wool warm?
Yes, Merino wool is warm, thanks to naturally crimped fibres that trap small pockets of air next to your skin to insulate against the cold. And if it gets damp, it just keeps on insulating. Unlike cotton, which gets cold and clammy real quick when wet. Merino also has a warmth-to-weight ratio that packs light and works hard – and what makes it different to a synthetic thermal is that it works both ways. Merino keeps you cool when you're hot and warm when you're not, buffering moisture 96% better than polyester rather than trapping heat or sweat.
7. Is Merino good for summer?
Yes, Merino is also good for summer or warmer climates. That's because the same moisture-buffering properties that keep you warm when it's cold, also keep you cool when it's hot. Merino wicks sweat away from your skin and lets it evaporate, rather than trapping it against you the way synthetic or cotton does. It's breathable and doesn't cling or chafe the way a soaked cotton tee does on a long, hot climb. And maybe the biggest win for summer? It naturally resists odour, which makes it a must-have when things get sweaty.
If you've only ever worn Merino as a winter base layer, a lightweight summer Merino tee is a game changer. It breathes when you sweat, resists odour, and keeps you cool and regulated all mission long. Our Merino outdoor collection has plenty of lightweight options engineered for warmer days.
8. Is Merino wool expensive?
Merino sits at a higher price point than synthetic base layers, but for good reason: quality. Merino is a performance fibre, not a plastic alternative. All our Merino is engineered with advanced technology, using innovative yarn spinning techniques to create ultra-soft, strong, and durable performance blends. The result is performance apparel with natural fibre benefits and athlete-tested construction: Merino that holds its shape, resists pilling, and doesn't need replacing every season the way cheap synthetics do.
These high-quality materials also demand careful stewardship, right from sheep to shoulders. Growers monitor their flock's health and nutrition and manage grazing across the seasons, all before the wool is even sorted and spun. Ethical, traceable sourcing costs more than mass-produced polyester ever will, because we believe in doing right by the animals and the land they graze.
9. Merino vs cashmere vs alpaca: which is warmer?
All three are luxury natural fibres, but they behave differently. Cashmere is generally considered exceptionally soft and warm for its weight, but it's known to be fragile: prone to pilling and not built for high-output activity. Alpaca fibre is often cited as warmer than sheep's wool gram for gram and is naturally hypoallergenic, but it's understood to lack the elasticity of Merino, so it doesn't bounce back into shape the same way after repeated wear.
Merino's advantage is that it's built to perform, not just to insulate. It manages moisture, resists odour and holds its shape through hard, sweaty use in a way cashmere and alpaca aren't designed for. Cashmere and alpaca are lovely for a jumper on a cold day; Merino is what you want for anything where you're moving, working up a sweat, or need it to perform for days at a time.
10. Merino vs synthetic: which is better?
Synthetic fabrics are cheap to produce, can dry quickly, and are durable enough to last long after you're done with them. They also trap odour, put plastic next to your skin, and don't naturally breathe or manage moisture the way Merino does.
Meanwhile, Merino buffers moisture, regulates your temperature, resists odour, and wicks sweat while you work. Synthetics might have a place for specific technical applications, but for anything worn next to skin over long days, Merino tends to win on comfort, performance and honestly – smell.
11. Why do we still use synthetics as a natural fibre brand?
It's no secret that Merino wool is scientifically proven to have natural performance benefits, which is why we lead with Merino in almost all our clothing and materials. We also supplement with other natural fibres, like hemp for added durability, organic cotton for that streetwear feel, or Tencel (lyocell) for added softness.
Our vision is to see a world of performance apparel without synthetics. Right now, that means keeping synthetics to as much of a minimum as we can. In some cases, that means not using it at all. In other cases, depending on material type and use case, it means using a percentage of nylon or recycled polyester for durability, stretch or shape retention, then wrapping it in Merino for its natural performance benefits. We'd love to ditch it entirely – and as Merino engineering and yarn technology continue to evolve, that's our goal. But we're also committed to creating performance apparel that genuinely benefits your life of outdoor action and adventure. And with the current material technology available to us, that sometimes means using synthetics.
12. How does Merino wool work at a fibre level? What makes it so good for performance?
Merino wool is nature's performance fibre, and the benefits of Merino wool seem endless. It's naturally temperature-regulating. It naturally resists odour, manages moisture, wicks sweat, breathes, keeps you cool when it's hot and warm when it's not, and is naturally super soft against your skin. Check out these Merino wool performance benefits, then explore the Merino Science to see the lab-tested results of how Merino compares to other materials.
Have a burning question we've missed? Check out our Help Centre for more information, or let us know and we'll get to work.
