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Altitude Crew

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Colour
Dark Khaki
Moroccan Blue
Black
Green
Blue
Slate Marle
Size
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 Crew Neck Base Layer is the ‘go to’ thermal layer for just about any adventure and our all-time best seller. It’s the perfect thermal layer for core warmth when you’re layering up, yet versatile enough to be worn on its own in milder conditions.

Tag-free, flatlock stitching and raglan sleeves help eliminate chafe and maximise comfort. The drop back hem and extra body length is designed for tucking into your outer layers. Thumb loops keep your hands warm and stop your sleeves riding up when layering.

This top is the perfect combination of performance, warmth and comfort.

(For a more relaxed fit try our Ultra or Universal tops.)

Ultra Trail Australia mandatory gear approved thermals.

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. 

Drop back hem and extra length in body. 

Thumb loops 

True to size. 

Model wears a size medium in Dark Khaki and Blue.
Model specs - height 179cm, chest 91.5cm, waist 81cm, hips 88.3cm.

Model wears size small in Moroccan Blue & Rust  .
Model specs - height 181cm, chest 103cm, waist 81cm.

Model wears size small in Black, Green, and Slate Marle.
Model specs - height 173, chest 99cm, waist 76cm.

Size Guide. Contact Fit.

Snow sports

Cycling 

Running

170gsm lightweight

18.5 microns

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 34 reviews
94%
(32)
3%
(1)
3%
(1)
0%
(0)
0%
(0)
P
Patrick Wilkes

Very comfortable, great fit & very warm

G
G Daly (Sydney, AU)
Perfect

All set for winter!

M
Mark James Baranowski

I like to use Merino base layers as t-shirts as wool is awesome, nature’s hi-tech material, and the form fitting material show off my physique. ioMerino has good quality wool, but I’m not a fan of the fit of this shirt. The thumb holes, and thus longer sleeves, bunch up on my arms, which I could get past, but when I move around the shirt bunches up above my pecs and stays that way, unless I constantly pull it down. For reference, My body is similar to the model’s for this grey color. I have a preferred brand but they run out of stock often and I was looking for different colors. Unfortunately, this shirt will get relegated to sleepwear only. So, 3 stars for quality and construction, but not 4 or 5 stars for my purposes.

T
Todd (Adelaide, AU)
Great all rounder

Nice, light and snug fitting, perfect as a base layer or to throw on over the top to keep you warm. Looks great, fits great, 100% happy with my purchase and already looking to add more merino to my running kit

B
Bronwyn Steer (Railton, AU)
Warm & comfortable

Very warm & comfortable, happily purchase again

A
Adam Kavanagh (Throsby, AU)
Another great piece of kit

It has been a while since i brought any IO and putting this on reminded me it has been too long. Putting this on is like a nice warm hug - i know that sounds ridiculous. The thumb loops work really well with the Newton Gloves. I wish i had gotten them at the start of the Canberra winter as opposed to the end.