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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 257 reviews

Super comfy and certainly noticed better temperature regulation when wearing for running or even with dresses on warm days

Awesome crop top

why wouldn’t you get one of these tops.....they don’t stink and can be worn for days without washing (ideal for multi day hikes), the fabric breathes so it’s comfortable especially in the heat and the best bit is the flat seams that don’t cause chafing. If you are looking for comfort this bra won’t let you down for low impact activities.

I bought boxers and singlet tops for my husband who will turn 80 later
this year who has a blood disease and feels the cold we were on holidays
during the very hot spell and even temperature 107.2 degrees he felt good
,my son recommended your sporting clothing as he also uses your gear as he
is a runner.These keep my husband warm in winter and cool in summer as my
son said they would. I love how they wash so well and he wears a clean
change daily so they are constantly in the wash and they look and feel
great . Ok they are quite a bit more expensive than Bonds underwear but
after six months of using Io merino as underwear we are happy with the

Great for cycling in the cold

I wear my Altitude Crew as a base layer biking in cold New England winter weather. Keeps me warm, wicks sweat away and when I'm riding I just forget about it, which is the best thing I can say about a base layer. I'm comfortable, warm and not sweaty. The quality of the workmanship is excellent, and the thingies that fit around my thumb keep the sleeves pulled down over my wrists and inside my gloves so my wrists stay warm. Also, the sleeves are quite long, which is ideal for cyclists.

It delivers

It's just as good as promised. It's warm when used as a baselayer, even in subzero temperatures, and I use it as a normal Tee when the weather is nice and it keeps me cool. It's as light as it gets, I recommend. Will probably order others some time.

Ultra Zip
Very satisfied

Product arrived very pleased quality product

Great Undies

Only had them a couple of weeks but wish I had been using them long ago. The usual chaffing issues in erm sensitive parts associated with running in hot weather have just gone away. I have found them comfortable and gotten used to wearing them very quickly.
I saw a longevity comment in another review and I’ll just say that all of my IOMerino gear is hand washed - I look after this gear pretty carefully but it gets some serious wear and I haven’t had any wear issues with any of the IOM range.


I purchased these leggings for a hike to Frenchmans cap Tassie Australia, so i needed to be prepared for any weather. It rained all the 5 days but these leggings did not dissapoint. They remained dry and comfortable ( not sweaty) under my wet weather pants and dry n warm to keep on at camp. Great even on their own in the drizzle, they nevet felt damp of cold.
They stayed up, i find it hard to get pants that fit in the waist and butt n legs. The high waist was super comfy.
And they where cool to walk in when the sun finally showed its face.
I would recommend these leggings
Actually i think all the girls on the walk are planning on buying a pair!

Exactly what is needed for a first layer

Looks good, fits very well, hoping that it will wear well

Natural Fibres

Love this Merino super warm, incredibly soft top. Everyone should wear wool.

Keystone Tee

Very pleased with this Tee. It is a gorgeous coral colour and I know I will get a lot of wear out of it. It is coming with me to Japan for a hike in a few weeks time, and I know it will perform well.

MY friend loves it

I bought the tank for a young friend of mine. She loves it. wears it everywhere. Says it feels really comfortable. Loose fitting but looks great

Love my new T

Bought the altitude T-shirt - felt itchy first try on but once it’s washed and worn a couple of times it’s soft and so good to wear running - great shape and cut - I’ll be buying more in that style 👍🏼

Zone Tee

Easy to wear and launder. Wish it was less expensive.

Great warmth for the weight!

Very pleased with these as they are light and thin but very warm under my wind pants. A perfect combo for our New England winter.

Coolest hikingshirt ever

Hi ioMerino, I absolutely love the mongrel-shirt. Is fits perfectly, the wool is amazingly soft to wear. It’s my favorite shirt. Too bad it is so expensive to buy from the Netherlands, but if you should open a store in the EU I will be the first in line for more shirts.

Ultimate tights.

Important to note that I am not a runner or a super active person. But I am so impressed, I might recycle all other pairs to charity. I literally wear it for 6 days, then one day in the wash. With two pairs of wool socks, I have narrowed my high-Winter wardrobe down considerably and have coped much better with the -4 to -11 temperatures. These leggings are warmer than any jeans or corduroy pants I was wearing last year this time. For the first time, I can also wear my wool dresses to work, as the leggings work perfectly with boots and a dress. Not maybe what you intended, but a great application for non-marathon runners like me. As far as fit is concerned – proper length in the leg means it does not ride up under short boots and socks when you sit down. The wide waistband holds in the tummy, much better under a tight-fitting wool dress than my old wool stockings. I understand garment construction and this design ticks all the boxes for me. Well done on great product development.

Losing longevity

Love this product for all the reviewed reasons, But, what’s happened to their longevity and durability?? I hike, ski and farm in them, they’re all I wear, but their life is decreasing it seems with each batch I buy. Noticed this trend when colours were introduced, for the $’s it’s nearly time to look elsewhere for a tougher product! Please fix iomerino!

Hi Alan, Thanks for your honest review on the Boxers. We're sorry to hear that you think there has been a decline in durability. We pride ourselves on making gear that is warm, comfortable and great quality so we're certainly disappointed to hear you haven't had this experience. We have a 1 year warranty on all our products, so if you have any issues please feel free to get in contact with us at customerservice@iomerino.com and we can hopefully help you with any of your concerns. Emma - ioMerino Customer Service
Amazing tights

I love these tights, the wide waist band makes them so comfortable for compression tights and they don’t fall down! Just amazing for multi day hikes as they hold no odour and dry so quickly overnight!

my husband loves his christmas presents.

the only problem i have is trying to get him to put them in the wash . He wears them for days at a time .Both the Altitude tank and the Keystone running tank are awesome .
They will be packed as part of him mandatory gear for the upcoming razorback run in the victorian alps.

very happy

Light weight, comfortable, great fit. Highly recommend this tshirt

Love my tube

So confortable, somehow able to keep me both cool in the heat and warm in the cold. Highly recommend.

Best Merino Ever

I was thankful to be able to find another to replace one that I had for several years. Incredibly warm for being so thin. My old one has been all over the world and came through every time.

crop top & all my other gear

I love all my IO Merino gear because its soft, comfortable, fits well. I especially love the colour choices.

Super soft but run a tad small

I love these undies, they are super soft and really comfortable. The new colours are fantastic, it was a good excuse to buy more. I do however think the sizing runs a bit small, and they are rather tight around the thigh, I never wear size L underwear but need to with these.

Hi Kat, Thank you for your feedback about the sizing. We will certainly look into this. Emma - ioMerino Customer Service