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Ultra Tee - S.A Rogaining Edition

Fabric Guide

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The Women's Ultra Tee is as soft and comfortable as ever combining all the natural benefits of our finest MicroMerino® fabrics with just enough nylon to create our most durable fabric ever to withstand the most demanding adventures

A true high-performance garment packed with extra performance features like tag-free labels and flatlock stitching that eliminates chafing and maximize comfort, and the reflective trims have been added for extra safety in low light.

Wear it on its own to stay cool in warm or mild weather, or as part of a layering system when the temperature drops

Print to order.Exclusive SARA limited edition print.  

Designed with a body-skimming, sports fit. 

True to size.

Model wears size medium.

Made with lightweight 83% superfine Australian Merino Wool, 12% Nylon for durability and 5% Elastane for an easy four-way stretch and freedom of movement.

Lightweight 160gsm

83% superfine Australian Merino Wool

12% Nylon for extra durability

5% Elastane for an easy all-way stretch

Customer Reviews

Based on 5 reviews
iO merino Super happy

I have a several iO merino items and I love them all. I am lucky enough to now own an ultra tee and it's fabulous. The merino is super comfortable, breathable and the fit is perfect. I also have to say that the communication/customer service with iO merino was outstanding. They are super helpful and nothing was too much or too hard for them. Excellent products and excellent customer service. Highly recommend :-)

Hi Mhairi, thank you for the positive review. We work hard to make great products with great customer service to match! We’re happy to hear we hit the mark for you!

Great top for running keeps you cool and warm

Thanks for the review Marcia! We're so happy to hear this tee hit the mark for you! Come back and shop again soon!
Very happy

I now have 3 T-shirts. The most comfortable running top I own

One for me, one for my friend

I am a massive fan of ioMerino products. I don't know how I ever travelled without them! I already own one of the Ultra Tees. It has actually become my cycling shirt. I recently wore it on a 6 day cycling trip in New Zealand. I wore it every day, did not wash it, and at the end it still DID NOT SMELL! Amazing! And it was so comfortable even in very sweaty conditions. I love the Ultra Tee so much that I bought one for my friend who does not as yet own any merino clothing. She immediately wore it on a 2 day hike and loved it. I absolutely recommend the Ultra Tee for comfort and non-smelliness!

womens scoop neck tshirt

Great fit & lovely weight


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: