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Altitude Zip

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Colour
Dark Khaki
Rust
Black
Moroccan Blue
Green
Charcoal Marle
Dark Blue Marle
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. The Men’s Altitude Zip Base Layer thermal takes natural temperature regulation to a whole new level. It is the perfect ‘go to’ thermal layer for just about any adventure, especially if you’re expecting to hit a range of temperatures. Zip down when it’s mild, zip up and thumb loops on when the temperature drops. The high collar also offers an extra level of warmth beyond the Men's Altitude Crew Neck Base Layer version of this top.

Flatlock stitching, raglan sleeves and tag free to eliminate chafe and maximize 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 Base Layer Thermal top is the perfect combination of performance, warmth and comfort.

(For a more relaxed fit try our Ultra Zip.)

Ultra Trail Australia mandatory gear approved thermals.

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

Drop back hem and extra length in body. 

Thumb loops.

Zip Neck.

True to size. 

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

Model wears a size medium in Rust, Morocaan Blue, and Green.
Model specs - height 181cm, chest 103cm, waist 81cm.

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


Size Guide. Contact Fit.

Snow Sports

Cycling

Running

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 43 reviews
95%
(41)
2%
(1)
0%
(0)
2%
(1)
0%
(0)
N
Neil Penny (Melbourne, AU)
Altitude Zip

Perfect for when riding my bike. Long sleeves are great for keeping the sun at bay. I find it breathes well and wicks very nicely. Highly recommended.

B
Ben Lyons (Toowoomba, AU)
Another great Merino product

Have been a long time user of merino products from ioMerino right from the early days and I am so glad to see them hanging in there and providing updated fantastic clothing. I use the base and mid layers all year round for golf, walking and exercise. Wish I could buy more. I still have ioMerino shirts from over ten years ago - amazing stamina!

A
Andrew Driscall (Melbourne, AU)
Can’t fault it

I find myself virtually living in it full time.

L
Lord Remi (Melbourne, AU)
IO

It's the best base layer I have, I've got several kinds but it's my favorite, I've bought two of them 10 years ago in Quebec. Unable to find any more, I made the purchase in Australia and I am still satisfied with the 2022 version.

C
Chris Halstead (Adelaide CBD, AU)

Great product works well for sea kayaking

P
Pero (North Vancouver, CA)
So comfortable

I have been wearing IoMerino for probably 15 years now, even going way when it IO BIO. The quality is top notch, and softer and better then the other top competitors. Unfortunately there isn't a Canadian distributor anymore, but that didn't stop me from still purchasing online and shipping here to Vancouver, Sizing is true .with the duty and taxes its a little more, but well worth it my opinion. The Altitude Zip is my favorite, it hugs the body so well, and regulates the heat, and colors are vibrant. During my winter rides when its down to 5c I wear the altitude, pinnacle Zip, and altitude neck tub with a high Vis wind stopping and its perfect. Overall I love the product line, and have many different pieces! The customer support is fantastic as well!

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