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Altitude Tee - Southern Cross

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Colour
Charcoal
Size
Design

Our Altitude range was originally designed as a baselayer, to fit close to your body for maximum performance, so it’s snug but soft, with plenty of give for extra comfort. If you’re usually a medium, for example, you might find the medium fits tighter than you’d expect because it’s designed to be ‘contact fit’ and look and feel like a second skin. If you’re looking for a more relaxed fit you might consider sizing up (it will still be relatively snug) or choosing another style

The Men's Altitude Base Layer ‘Southern Cross’ Tee is the perfect addition to any outdoor lover’s wardrobe, designed to suit all levels of activity. 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.

Wear 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.

(For a more relaxed fit try our Ultra or Universal T-shirts.)

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

Originally designed to be worn as a base layer, (is usually underneath something else), this is a ‘contact fit’ layer so will hug your body. If you don’t want it to fit, feel or look like a second skin, you might try another style, or go up a size, but please note: even going up a size will fit quite close to your body because of the fabric and cut. 

Regular body length, shorter than the Altitude long sleeve styles.

Model wears size medium in Charcoal Marle.
Model specs - height 181cm, chest 103cm, waist 81cm (32 inch). Normally wears 32 inch pant, 10-11 size shoe.

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 35 reviews
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Tauqeer Khan (Sydney, AU)
Looks great, and good choice of colours

I am regular user of extra fine merino tshirts for my gym and bike rides. I have had a few different brands. This one was well stitched and styling wise looks great. I found wool to be a little chafey compared to some other brands (not sure what merino fiber grading is this), also I wish they would provide technical info such as weight in grams, and merino grade (how many microns). Also I am not sure if there is any mixed elastin/lucra or another blend fibers added

Hi Tauqeer and sorry to hear you had a chafing issue. That’s super unusual and not something we can remember hearing from any of our customers unless there was something else rubbing - we’d actually really like to know more about where it chafed so we can understand the problem better, and as part of our money back guarantee, if you’re not happy, we will absolutely replace or refund your top no worries at all. Just contact customer service to arrange that. Just so you know, we can confirm the online product description has a fabric tab that shows this top is 96% merino (we only add 4% elastane to give it some extra stretch), and depending on how you are hoping to see weight measured, we supply the standard gsm measurement which is 170gsm. (We don’t weight every size etc, just give the industry standard gsm which is grams per square metre.) As far as microns go, although that is not listed on our fabric description we have a whole page of info about our ‘MicroMerino’ fabrics which explains it’s 18.5 microns which is classified as ‘fine' and on the cusp of ‘superfine' - you’ll find that here: https://iomerino.com/pages/micromerino
 - which is about as fine as you can go in clothing like this without starting to compromise durability. Please feel free to contact customer service so we can help you with your top.

G
Graham White (Brisbane, AU)
Worth the expense

Best and most comfortable merino clothing for the UK and Canada winter. A must buy is the base layers. Tops and leggings. Very happy with my purchase.
Easy to care.
Can't wait to use my gear for next trip to Finland 2025.

B
Brett Kahlert (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.

M
M.Z.

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.

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