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November 09, 2018

Not all leggings are created equal. But if it’s warm legs you want, this is what you need to know.


Killer Cotton.

We’re going to try to be nice here, but honestly, if you’re wearing cotton to keep your legs warm, you’ve basically chosen the worst possible option other than actually wearing an ice pack. There’s a reason Search & Rescue teams around the world call it ‘Killer Cotton’, because it won’t just fail to keep you warm, it can actually make you colder. And under extreme conditions, dangerously cold. If you really want to wear cotton casually, go for it. But please, please do not wear it to keep yourself warm. Especially if there’s a chance you may get even slightly damp - from the environment or perspiration. Cotton leggings are not suitable to keep you warm when you’re out in the elements. (Without overloading you with the science, when cotton gets wet, the air pockets fill up with water and if the air is colder than your body temperature, you're in big trouble.)




Stinky Synthetics.

Depending on how fancy you like to look, and how much of a statement you want to make with your legs, regular synthetic ‘tights’ or ‘leggings’ may or may not be a bit of a fashion statement to express your personality. But that’s about it. Not that looks aren’t important, of course, but they won’t really keep you warm. Even if they look hot. We’ve heard people say wearing them is like they’re “Wrapped in plastic wrap”. Which is hardly surprising because that’s essentially true. And Polyester, like plastic, cannot absorb moisture or perspiration. To be fair, some synthetics are better than others at keeping you warm, but then there’s the smell. “My husband wore polyester undershirts on his tours to Iraq, and years later, they still smelled bad no matter how many times I washed them.” Stinky synthetics. Enough said.




Compression Tights.

There’s some pretty awesome brands out there making compression garments. And those garments are great for, not surprisingly, providing compression if that’s what you’re looking for. What regular compression tights are not great at, is keeping your legs warm. There’s a very good reason trail races like Ultra Trail Australia do not allow these as their mandatory thermal leggings. Because they’re not thermal leggings. Most of them will not keep you warm. Plain and simple.





OK, now we’re talking. You may say we’re bias because that’s what we do, but no, it’s just a fact, If you want warm legs when it’s cold, you want actual thermal leggings. Ask around, and even the experts will tell you there’s still no man-made fiber that performs like Merino. There are, of course, a few different types of thermal leggings going around - from stinky synthetic ones to awesome natural merino ones - like ours. But the extra benefits that come with choosing a natural fiber like Merino, and our extra soft and comfortable MicroMerino® thermal leggings in particular, make them almost impossible to beat. Natural. Moisture-wicking. Thermo-regulating. Breathable. Odor-resistant. And warm. Now that’s what a good pair of thermal leggings should be. Plus, with our revolutionary new Merino-Compression Leggings, you can get all the benefits of compression with the performance of Merino combined.


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Fabric Guide

While Merino is an amazing natural fibre, not all Merino fabrics are created equal. At ioMerino, we make our own fabrics, using only the best quality fibres, and to very specific specifications that make the most of the natural benefits of Merino. All of them are 'Merino rich’. No cheap blends passed off as Merino. No cheaper scratchy fibres or synthetic substitutes to save money. No unethical production. And each fabric is made for a specific purpose. So if you see something with a small amount of elastase or nylon added, you can be sure it absolutely needs to be there to enhance the natural stretch and durability. 

It took every bit of our 140 years of experience in the wool industry to perfect our fabrics, but we think you’ll agree the end result was more than worth the effort.

Ethically Made. Ethically Sourced. Perfectly Natural. 


Altitude / Zodiac

Lightweight 170gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric. 


Ultra / Universal

Lightweight 160gsm 83% Australian Merino Wool blended with 12% nylon blended for extra durability and 5% Elastane for stretch and comfort.



Midweight 265gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric. 


Summerino - Keystone 

Ultra Lightweight 150gsm 100% Australian Merino Wool. A MicroMerino® Fabric. 


Merino Compression

Midweight 280gsm 76% Australian Merino Wool, 15% Elastane and 9% Nylon for extra stretch and compression properties.



Ultra lightweight ribbed 155gsm 100% Australian Merino Wool. A MicroMerino®  Fabric. 



Outer Weight 280gsm Fleece 100% Australian Merino Wool. MicroMerino®  Fabric. 



Midweight 260gsm 100% Australian Merino Wool. A MicroMerino®  Fabric. 



Midweight 260gsm waffle texture 100% Australian Merino Wool. A MicroMerino®  Fabric. 


Stride / Glacier / Velocity

Midweight 255gsm French Terry 100% Australian Merino Wool. A MicroMerino®  Fabric. 


Natural Merino Wool benefits: