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Altitude Tee

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Color
Black
Size

Our Altitude range is designed to fit close to your body for maximum performance, so it’s tight but still soft, with plenty of give for extra comfort. Designed for our trail runners, one of our best performance layers just got a makeover! The  Men's Altitude Base Layer ‘Run all the Trails’ Tee is the perfect addition to any outdoor lover’s wardrobe. It’s super lightweight, breathable yet incredibly warm. This T-shirt is ready to keep you warm, comfortable and protected from the elements during all of your trail adventures, no matter how big or small they might be.

The Altitude Base Layer Tee takes you through a wide range of temperatures and conditions; the high round neck offers extra protection, and the sleek, tapered fit is designed to suit all levels of activity. Wear this Base Layer T-shirt with extra layers for extra warmth when the weather hits hard, and when the temperature rises, you’ve got the perfect lightweight and breathable T-shirt.

You can always size up if you want a little more room, but it’s definitely designed to fit close to your body. (For a more relaxed fit try our Ultra or Universal T-shirts.)

Tag free, flatlock stitching, raglan sleeves eliminate chafe and maximize comfort. 

Designed to be worn as a body tight ‘contact fit’ layer. 

New improved fit. Regular body length, shorter and looser than the Altitude long sleeve styles.

Model is 6'2" and wears size medium in Black.

Size Guide. Contact Fit.

Running

Cycling

Snow Sports

170gsm lightweight

96% superfine Australian Merino

4% Elastane - for an easy all-way stretch.

A MicroMerino® Fabric.

BENEFITS OF MERINO

LIGHTWEIGHT

THERMO REGULATING

SUPER SOFT & COMFORTABLE

BREATHABLE

MOISTURE WICKING

ODOUR RESISTANT

NATURAL

ETHICALLY MADE

Customer Reviews

Based on 33 reviews
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(33)
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B
B (Sydney, AU)
Great base layers

One of many excellent ioMerino products I've purchased and will continue to do so. These are among the best base layers.

S
S.P.

Amazing

M
Mark Daley (Breckenridge, US)
Summer T-Shirt

To get the right fit I sized up, and it is now part of the summer t-shirts

A
Andrew Jarvis (Perth, AU)
Quality Product

Very happy with this purchase. Fits well. Well made. And does it’s job. Keeping me warm.

C
Cass
Altitude Tee

I'm really happy with my Altitude Tee. It fits exactly as described and pictured. It IS a clingy item, but doesn't feel tight. I wear it for cooler weather personal training, and the Altitude Tank for warmer weather training. For the purpose, I appreciate the extra length of the Altitude range. The colour (green) suits my preference, and I'd like to see this colour as an option on more products! Like my other IO products, the feel of the merino wool is pleasant. It feels like a 'quality' item. The delivery was prompt, and I appreciated the discount that was available at the time. And best of all, the IO people are great to deal with!

J
JL (Sydney, AU)
Consistent Quality

I live in these clothes, love merino wool!

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