If you’ve ever bought one of our products before, we’d love to hear what you thought about it. And so would everyone else. If you could take even 30 seconds to leave a quick review, it would be really useful to everyone else who might be considering buying that product. And if you haven’t bought one of our products before, check out what some of our customers have to say about their ioMerino. As always, if you don’t absolutely love what you’ve bought, or have any questions, just email our ultra helpful customer service team and see if they can’t get you sorted out.

Based on 1549 reviews
Altitude 'Mongrel' Tee
Helen (Adelaide, AU)
Perfect in any weather

Light, bright and soft. A wonderful change from boring options. Not itchy and let’s the breeze in on a warm days walk.

Summit Easy Fit Hoodie
Jenni Watkins (Adelaide, AU)

My new blue women's summit easy cut is excellent. It is my second IO zip up hoodie and I like this one best because of the deeper pockets and slightly wider fit. Well worth the purchase.

Universal Long Sleeve
Shane K. (Brisbane, AU)
Very comfortable

Very comfortable, I have a few short sleeved ones so wanted a longer sleeve option too for the cooler months.

Ultra Tee - Live To Run Back
Tracy (Adelaide, AU)

My sort of print on my favourite tee! I was so excited when I saw this .. completely different look to what you'd normally get in merino. Lucky that you don't have to wash it often, coz I'd have to take it off :)

Good but could be so much better

These tights are brilliant in terms of temperature comfort in different seasons, and in their anti-sweat/anti-odour properties. They are also hard-wearing - I wore them running most mornings for a year or so and they lasted pretty well. They would be so much better, though, if they didn't have the large imposing logo at the front, and if they had more flattering seam lines (the seam line is too straight and low on the bum). There are so many flattering tight out there that have nailed the seam lines, so it would be great if IO's designers could look at them for inspo, so we can have flattering tights that are better for the environment! Also, after a year they weren't squat-proof, so perhaps slightly thicker fabric would be beneficial.

Mullet Trail Sock
Ed Westrich (Adelaide, AU)
Work & Play

I received a pair of these socks from the Rockleigh 105 gravel ride. After a few weeks I found myself looking for these, rather than others, to wear for a ride or for work.
Comfortable as, so I bought a few more pair to wear for work too.

Mullet Trail Sock
Fern Patterson (Brisbane, AU)
Perfect trail run socks

I love the mullet trail socks. I wore them for the first time completing a slow 14 km trail run through 11 creek crossings. The socks quickly wicked away the water and worked in synergy with my trail sneakers, leaving my feet comfortable and cool for the duration of the run and the commute home.

BEST undies ever

Oh my goodness, these undies are incredible. i bought 2 to try, then stocked up for my 2nd undies order. Incredibly comfortable and they feel fabulous!

Universal Polo
Leanne (Brisbane, AU)

Collared merino tops are VERY hard to find these days. I like the sun protection of a collared shirt and back pack straps wont come in contact with my skin either. Thrilled to find the Women's Universal Polo online. I was hesitant about sizing, I would have loved to have been able to try one on first, but I went with the sizing guide provided and ordered a large (even though I am normally a size 12) My polo arrived within 24 hours of ordering - AMAZING. The large is perfect and I look forward to many hikes in comfort. If there was another colour option I would be ordering another one immediately.

Chaser Neck Warmer
Linda (Melbourne, AU)


Ultra Zip
Carmen Grzesik (Adelaide, AU)
Came back for more !

I took this top and a Universal Tee with me hiking in Slovenia late August. Both were so good on the trail ( kept me cool while hiking and
warm at night, and didn't get smelly after several days) that I bought another of each. They worked just as well in the drizzly chilly Spring weather Adelaide's having at the moment.

Zone Raglan
Carmen Grzesik (Adelaide, AU)
Great service, love this top!

Wasn't sure which size to buy, my email query was handled within the hour and the top arrived a couple of days later.
Perfect fit, super comfortable, it's going to Cradle Mountain with me next month. Happy happy!!

Universal Tee - Austrailio
Carmen Grzesik (Adelaide, AU)

Liked my first one so much I bought another one!

Altitude Boxers - Ready for Adventure
Richard Killen (Gold Coast, AU)
Satisfied customer


Mullet Trail Sock
Michael (Hobart, AU)
Great trail socks

These new trail socks are great for running the Tassie trails. Good looking and super comfortable.

Summit Zip Hoodie
J.S. (Sydney, AU)
Best hoodie ever

This one I bought for my husband, I have two of them myself. Excellent piece of clothing!

Altitude Zip
becky harris (Adelaide, AU)

It's great product my second purchase. Tested it in wet, cold, warm conditions & performs well as well as being comfortable

Universal Tee
Shane K. (Brisbane, AU)

I bought three for an upcoming hike and they are perfect, very comfortable and breathe well.

Pinnacle 2.0
Shane K. (Brisbane, AU)

Very comfortable, wore as a middle layer in the snow, and as an outer layer in milder weather. Looks great and kept me warm.

Altitude 'Mongrel'
Campbell Aitken (Melbourne, AU)
love the mongrel!

Great warmth, comfort and looks, and can be worn for several days without getting stinky! I loved my first two mongrels so much, I just bought two more.

Altitude Crew Neck
Alison (Melbourne, AU)

So comfy and warm. I am wearing it all the time underneath everything! Warm yet not bulky.

Ultra Trunks
Angus Hughes (Melbourne, AU)
Best crusties!

Very comfortable. Will be ordering more.

Altitude Zip
Fiona Whitesen (Sydney, AU)
Love this!

Fits well, high quality, very impressed.

Pace Sports Bra
J.S. (Sydney, AU)

I’ve been eyeing this bra for a while now but hesitated because I don’t usually do well with non-adjustable sports bras. Since I ordered something else I thought I’d give it a shot and I’m so happy I did - just finished my run and this is an excellent piece. Great fit, great support, great fabric (I’m a 10F and bought size M)

Ultra Zip
Kaye Potter (Melbourne, AU)
Love this garment

This is my second purchase of this style. I love the wool next to my skin in all weathers. I love the square shoulder design. I love the cherry red colour.


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 - Celsius 

Made from 45% ultra fine MERINO (Ultra Lightweight 150gsm), 45% natural TENCEL (made from sustainably grown wood fiber), and 10% nylon for extra durability. 


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: