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 1593 reviews
Altitude Tee - Run All The Trails Original
Penny Thomson (Brisbane, AU)
I give this top marks

Bought this for my daughter who DOES run ALL trails - champion trail runner, represented Australia twice in overseas trail championships (worldwide), she epitomises the trail runner, happy, caring, loving nature. Ideal present for her, I think.

Universal Polo
D.L. (Adelaide, AU)

One of my specific reasons for buying the polo, apart from wearing it casually, I wear it under my yellow protective clothing as a volunteer firefighter. It is extremely comfortable in very hot conditions as it does not stick to your skin when sweating heavily and with the wicking ability helps with managing my body heat. Being wool it also gives that second level of protection against burn injuries.

Hiking Socks
D.L. (Adelaide, AU)
foot huggers

The socks are soft, comfortable and fit like a glove, a perfect sock to wear with boots.

Altitude 'Mongrel' Zip
Lorill Jensen (Kelowna, CA)
Fits small

I ordered the XLand it is tight. I normally wear a Large, never an XL.

I would say in Canadian sizes, it is more like a medium or large slim fit. Not very flattering if you have any love handles. It is cute and I hope I can lose enough weight to wear it one day.

Pace Compression Leggings - Original
Customer (Fort Wayne, US)

I have stopped wearing leggings under my skirts for awhile now because of all the synthetic fibers and I decided to get these after a very long search to find the best. After about 1.5 months of searching and reading reviews I decided to get these. I followed the size guide and I found a perfect fit, I never want to take them off. Now I wear long, mostly ankle length skirts and I run in them so I sweat and I sweat a lot but these are amazing. I also have very stretched out skin from having children and these really hold things tight so my skin doesn't hurt when I run or itch. So pleased! I'm super excited to get a second pair but I need to save a bit for them. They also keep their shape after a couple days. I'm so thankful!

Altitude Brief - Ready For Adventure
Teresa Ukrainetz (Sydney, AU)
Comfy undies

Fantastic undies for hiking and love the hot pink

Yoga Pants
Tracey Porter (Melbourne, AU)
Great Pants.

These have been a great buy. They were a little long and I took them up. They fit well and ate veey comfortable

Yoga Pants
Donna (Calgary, CA)
Excellent - Love wearing the yoga pants

Great fit, fabric is light and warm
Very comfortable for travelling on long haul flights
Nice to relax around the home in too

Stride Tracksuit Pants
BRYAN CULLUM (Balliang East, AU)
Great trackies

These track pants are a delight to wear. They are light comfortable and easy to wear during any activity. They also wash well. Also smart enough to wear while just out and about.

Ultra Tee - Orange
Libby Thompson (Melbourne, AU)
Ultra Tee

This tee is kinda sheer and a little see through, which I wasn't expecting. It is soft and comfortable though. A good running tee.

Yoga Pants
Jillian (Sydney, AU)
Perfect for travel

These yoga pants were perfect for my recent trip to the UK. Comfortable all the way during the long flight and perfect for the cold weather there on arrival. I wore them the whole time I was away and they didn’t crease, lose shape or go baggy in the knees! Am about to buy another pair…

Freedom Sweatpant
Deirdre (Sydney, AU)
Comfort & Style

Beautiful fit. Very comfortable. Bought the set and pleased I did.

Freedom Sweatshirt
Deirdre (Sydney, AU)

True to size. Ultra comfortable. Perfect colour match to pants. Super pleased.

No Show Socks
Libby Thompson (Melbourne, AU)
Love these socks!

These are soft and wick moisture really well. I love takng them for a run. They are my favourite socks right now :-)

Summit Easy Fit Hoodie
Libby Thompson (Melbourne, AU)
Love this hoodie!

It is cuddly soft and washes well. My husband loves his too. Nice and warm. Well worth it. Will definitely buy again.

Ribbed Beanie
Michael (Hobart, AU)
Does what it says

Ideal beanie for Tassie's cold days

Altitude 'Mongrel' Crew
Michael (Hobart, AU)
So good, I've bought a second one

This is a versatile crew. Great for running, yoga and keeping hands warm.

Ultra Trunks
CKA (Melbourne, AU)
truly excellent underwear

comfy, wicking, long-wearing, dry fast, look great - what else do you need?

Universal Tee
Janis (Adelaide, AU)

Great fit, feels good will definitely buy another

Ultra Trunks
martin moses (Melbourne, AU)
the best trunks on the market

being an avid supporter of the merino industry and io merino product i purchased 3 pairs of the mens trunks about 12 months ago- it was not long before i dreaded wearing the cotton brands i was wearing prior to that. I then purchased enough IO mens trunks to ensure i had 100% comfort 100% of the time.

Runs very small

I previously purchased these Altitude Briefs in size large which is we within my normal size of 12, these were to small so purchased x-large which should have been plenty roomy, only to find them essentially the same size as large when layed over them. Very disappointing as I usually love the ioMerino clothes.

Summit Zip Hoodie
R.D. (Melbourne, AU)
Fabulous hoodie and amazing service!

I’ve been after a good hoodie for a while and had my eye on this. I bit the bullet on Monday, called up, got great service over the phone and when I got home from work today it had arrived! The hoodie itself is feels so soft, fits great and the quality is amazing. Now considering buying a different color! Thanks IO!

Summit Zip Hoodie
J.J. (Saint Charles, US)
Very impressive. A warm, densely constructed classic hoodie. And best of all, it's made of merino!

I'm very pleased with this black hoodie, which I've had for about a week and a half now.

First off, it's surprisingly substantial and densely woven for a merino garment. Because of this, the hoodie provides above average wind resistance - and hence warmth - when used as an outer layer compared to other merino hoodies I've owned (Icebreaker Quantum, Chrome Cobra V1).

I also appreciate the non-technical, classic styling. There's nothing wrong with a more tailored, athletic, technical looking hoodie, but the majority of merino hoodies on offer in the market fit that description, so it's welcome that IO Meriono offers us an option with a more casual look.

Again, I can't praise enough the density of the weave of the fabric used for this hoodie.

The only drawback - which is quite minor - is that due to the thickness and strength of the fabric and stitching around the cuffs, I'm unable to pull the sleeves back to my forearms. But that's okay, I'll gladly trade that feature for a garment of this warmth and exceedingly high quality.

Thank goodness the sharp-looking black version doesn't come with the tacky front-and-back silkscreen branding (sorry, IO Merino, it's not personal - I don't enjoy feeling like a billboard for any of the clothing I buy). The white silkscreen lettering on one side of my black hoodie is more than enough branding for my liking.

Would certainly buy again. Overall, nice job, io Merino!

Ultra Crew Neck
colin green
New Running Long Sleeve

Only used a couple of times but it’s great. Comfortable fit keeps me warmer than a t shirt and the thumb holes help keep fingers warmer on frigid hills mornings. Time will tell for durability. Love the colour (mint I think)

No Show Socks
Jules D (Brisbane, AU)
No Show Socks

Most comfy socks I’ve ever worn - love wearing them


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: