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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 1254 reviews
Universal Tee - Wolf
Hiking t-shirt

Very comfortable. Breathes well. Love the loose fit.

Altitude 'Mongrel' Zip
Fiona (Adelaide, AU)
Love my Mongrel

This is my first mongrel and third ioMerino top. Love the zip feature, perfect for running in. Fit is true to size. Top is perfect for South Australian frosty mornings.

Yoga Pants
Susan Rundle (Melbourne, AU)
Best yoga pants for cooler weather ever!

So comfortable, so warm, and they look good too!
May need to buy another pair or two.

Glacier Tracksuit Pants
michael schaefer (Adelaide, AU)
Glacier track pants

Very comfortable, easy care they are great for working from home.

Stride Tracksuit Pants
michael schaefer (Adelaide, AU)
Stride Track pants

Well made extremely comfortable and does all the things the great fibre of wool is known for, keeps you warm , cool depending on the conditions and always comfortable

Altitude Crew
Jessica Rucks (Melbourne, AU)
So soft

I love this top - i want every colour. Its so soft, and the sleeve length is perfect. Love!

Ultra Zip
Lisa (Sydney, AU)
Love it

Bought this for my hubby for fathers day and it's been worn non stop since. Love the silver pine colour, it is so versatile and something a bit different from the standard navy or black that most merino wool products for men come in. Great quality product and true to size.

Altitude 'Mongrel' Zip
Lynette Grivell (Adelaide CBD, AU)
Mongrel bite

This wool jersey is not only warm and comfortable, it looks mean! Always a fan of I/O!

Altitude 'Mongrel' Zip
Carol-Ann (Sydney, AU)
Comfort Plus

Having recently purchased my third mongrel, I can say honestly and from experience that it is the comfiest, best fit top I own. I love the colour and the addition of the zip neck. I’m usually a small but take a medium in io merino sizing.

Altitude 'Mongrel' Zip
Norma Edwards (Northcote, AU)
Just love my mongrel!

After initially ordering a size too small I received my exchange in no time at all-Io is SO good at getting mail to come quickly! The mongrel is great-has hardly been off sine it arrived a week ago. Its comfy and long and fits over other layers and just right for this time of the year. Just a small hint-go up a couple of sizes with this one unless you want it to be skin tight.
Thanks Io-you've done it again!

Keystone Running Tank
Barbara (Sydney, AU)
Nice top

I bought a small and it is a little big but otherwise nice. Will be interesting to try it out when the weather warms up

Altitude 'Mongrel' Zip
Barbara (Sydney, AU)
Nice top

I would usually buy a small but medium is perfect in these tops as I wear another layer underneath in winter. Lovely bright colours and so soft and warm

Hiking Socks
Adrian T (Melbourne, AU)
Feet are feeling great

The socks are very comfortable and still feel good after a day walking. Easy to care for when travelling and dry fast. A pleasure wearing them. My feet love them.

Ultra Tee
Adrian T (Melbourne, AU)
Excellent quality and genuine sizing

Online buying can be hit and miss when companies aren't accurate in their claims of sizes and quality but ioMerino is perfect in both. The size was exactly as described and their review of fit in the description was spot on (one shirt I looked at advised about the slim fit so I avoided it like the plague). I also like that they haven't tried to save money during production by cutting the shirt too short (like some other companies - really annoying if they do). It provides good length for lower back warmth and enough length to tuck it in nicely. Very comfortable and easy care with the small non wool content.

Great product.

These are awesome , but I wich they were a little bit longer, as I am a tall person. Would be great if there was a longer length option. Thank you.

Zodiac Thong
Nikki (Adelaide CBD, AU)
Surprised how comfy it was

Been a while since I ventured out with a thong on, but was super comfy to wear and of course great fabric. Totally recommend.

Altitude Tee
Ross Angood (Sydney, AU)

Very happy with the product

Zodiac Bikini Brief
Luther's mum (Melbourne, AU)

I got the blue marle colour in XS. Love it! There was a problem with my order and IOMerino went over and beyond to rectify it, Really impressed.

Altitude Tee - Run All The Trails
Tania Smith (Adelaide CBD, AU)
Magnificent products

Magnificent products

Altitude 'Mongrel'
Lyndal Warne (Melbourne, AU)
ioMerino you have my business!

I LOVE MY MONGREL TOP ! it's perfect for fresh mornings , moisture control and I love the colours . Please make more fun colours . I have worn merino for a long time and im so glad I found you 💕 I wish I could post a pic too of me wearing mine .

Thank you Lyndal :)
Really appreciate how much you love the Mongrel! It's definitely a favourite around our office too. You can always tag us in your pics @iomerino on Instagram or Facebook. We love to see people out and about in our gear.

Altitude 'Mongrel'
Coralie (Adelaide CBD, AU)
Wot a mongrel

Love this too for crisp days and nites. The quirky design is brilliant. If u want to push sleeves up I would go up a size.

Altitude Tights
Stephen A. (Perth, AU)
100% Comfort

I was initially sceptical about how comfortable these tights would be, but I feel like I could wear them all the time. They are great for keeping your temperature at ‘just right.’ I’ve been wearing them under jeans this winter which makes a perfect combination of style and comfort.

Yoga Pants
Carmel Bell (Melbourne, AU)
Versatile, stylish and lovely pants

These pants are fantastic. I really love them. I find them so comfortable and easy to wear and they look great! I wish there were more styles and colours. Thanks Iomerino for the great clothing. Boot legs next?? Best, Carmel Bell

Theses are the best tee shirt. Everything about them suggests quality.

Altitude 'Mongrel'
Dianne (Hampton, AU)

First purchase from ioMerino. LOVE everything about the Mongrel - the colours, the feel of it and the versatility. Wore it for the first time yesterday for a run - warm, breathable and super comfy 👌 .


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: