Altitude Crew Neck

Fabric Guide Size Guide

Men's Size Chart

Click here to learn more about our different fits and how to choose the size that's right for you.

We strive to make all our products true to size. The sizing chart below is not garment specific, but hopefully, it will give you some guidance when choosing your size. In instances where you’re perhaps in between two sizes try choosing the smaller size.

For further assistance with sizing, contact us here.

Men's General Size Chart

		XS	S	M	L	XL	XXL
Waist	Inch	27	28-30	32-34	36-38	40-42	44-46+
	cm	68 - 70	71-76	81-86	91-96	101-108	111-116+
Chest	Inch	32-34	34-36	38-40	42-44	46-48	50+
	cm	81.5 - 86	86-91	96-101	106-111	116-121	127+

Tracksuit Pants

Outside Leg measurement (including waist band).

Model height 6'2 , wearing a size medium.

		S	M	L	XL	XXL
Inside Leg	inch	29	30	30.5	31	31.5
	cm	74.5	76	77	78.5	80
Outside Leg	inch	41	41.5	42	42.5	43
	cm	105	106	107.5	109	110

Merino-Compression Leggings

Model height 6'3 , wearing a size large.

		XS	S	M	L	XL	XXL
Inside Leg	inch	25.4	26.4	27.4	28.3	29.3	30.3
	cm	64.5	67	69.5	72	74.5	77

Altitude Tights - Ready for Adventure

Model is 6'2" and wears size medium.

		XS	S	M	L	XL	XXL
Waist	inch	25.0	26.9	28.8	30.7	32.6	34.5
	cm	63.6	68.4	73.2	78.0	82.8	87.6
Hip	inch	31.6	33.4	35.1	37.0	38.7	40.5
	cm	80.4	84.8	89.4	94.0	98.4	103.0
Lower Hip	inch	20.5	21.6	22.8	24.0	25.1	26.3
	cm	52.0	54.8	57.8	61.0	63.8	66.9

$110.00

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DETAILS
SIZE & FIT
BEST FOR
FABRIC - ALTITUDE

DETAILS

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 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.

SIZE & FIT

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

Drop back hem and extra length in body.

Thumb loops

True to size.

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.

Model is 189cm and wears size large in Blue.

Size Guide. Contact Fit.

BEST FOR

Snow sports

Cycling

Running

FABRIC - ALTITUDE

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

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

Warm & comfortable

Very warm & comfortable, happily purchase again

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.

Merino Base Layer.

I use Altitude as a light weight base layer for cycling. It keeps me warm, but not hot even if i get it all sweaty. Initially I thought the the “glove” extension of the sleeve was a bit odd, but now in the cold weather I find it useful in keeping my hands warm. They fit easily under my cycling gloves, leaving no gaps.

Get warm this winter

Two new tops are providing me with continuous comfort and warmth while l work from home. No itchiness whatsoever. Multi wear between washing. The tops are a very solid base from which to start your clothing layering.

First purchase

I purchased an Ultra Zip, an Altitude long sleeve crew and a skull cap. I am generally between Medium & Large. In these styles for me at least - Medium is plenty big enough. The Ultra Zip fancy enough to wear to the pub or out to tea, the Altitude tee does the job exactly as described. The skull cap is brilliant. Small, warm, thin - definitely an essential piece if kit for Autumn/Winter in Adelaide.

Short version is - more than happy - hoping for a good long life and will look to buy more. The Ultra fabric smoother - the Altitude "feels" tougher. Might go for Altitude when looking for warmth and robustness - Ultra when looking for style & comfort.

A solid 4 1/2 out of 5 stars and I am told I am not easy to please!!!!!

Cheers
Richo (Adelaide AU)

1 2 3

Instagram

Awesome

One of my specific reasons for buying the polo, apart from wearing it casually, I wear it under my yellow protective clothing as a volunteer firefighter. It is extremely comfortable in very hot conditions as it does not stick to your skin when sweating heavily and with the wicking ability helps with managing my body heat. Being wool it also gives that second level of protection against burn injuries.

D.L.

03/25/2023

Universal Polo

foot huggers

The socks are soft, comfortable and fit like a glove, a perfect sock to wear with boots.

D.L.

03/25/2023

Hiking Socks

Amazing!

I have stopped wearing leggings under my skirts for awhile now because of all the synthetic fibers and I decided to get these after a very long search to find the best. After about 1.5 months of searching and reading reviews I decided to get these. I followed the size guide and I found a perfect fit, I never want to take them off. Now I wear long, mostly ankle length skirts and I run in them so I sweat and I sweat a lot but these are amazing. I also have very stretched out skin from having children and these really hold things tight so my skin doesn't hurt when I run or itch. So pleased! I'm super excited to get a second pair but I need to save a bit for them. They also keep their shape after a couple days. I'm so thankful!

Customer

03/23/2023

Pace Compression Leggings - Original

Comfy undies

Fantastic undies for hiking and love the hot pink

Teresa Ukrainetz

03/22/2023

Altitude Brief - Ready For Adventure

Excellent - Love wearing the yoga pants

Great fit, fabric is light and warm
Very comfortable for travelling on long haul flights
Nice to relax around the home in too

Donna

03/21/2023

Yoga Pants

Great trackies

These track pants are a delight to wear. They are light comfortable and easy to wear during any activity. They also wash well. Also smart enough to wear while just out and about.

BRYAN CULLUM

03/21/2023

Stride Tracksuit Pants

Perfect for travel

These yoga pants were perfect for my recent trip to the UK. Comfortable all the way during the long flight and perfect for the cold weather there on arrival. I wore them the whole time I was away and they didn’t crease, lose shape or go baggy in the knees! Am about to buy another pair…

Jillian

03/21/2023

Yoga Pants

Comfort & Style

Beautiful fit. Very comfortable. Bought the set and pleased I did.

Deirdre

03/20/2023

Freedom Sweatpant

Perfection

True to size. Ultra comfortable. Perfect colour match to pants. Super pleased.

Deirdre

03/20/2023

Freedom Sweatshirt

truly excellent underwear

comfy, wicking, long-wearing, dry fast, look great - what else do you need?

CKA

03/17/2023

Ultra Trunks

Great fit, feels good will definitely buy another

Janis

03/17/2023

Universal Tee

the best trunks on the market

being an avid supporter of the merino industry and io merino product i purchased 3 pairs of the mens trunks about 12 months ago- it was not long before i dreaded wearing the cotton brands i was wearing prior to that. I then purchased enough IO mens trunks to ensure i had 100% comfort 100% of the time.

martin moses

03/16/2023

Ultra Trunks

Fabulous hoodie and amazing service!

I’ve been after a good hoodie for a while and had my eye on this. I bit the bullet on Monday, called up, got great service over the phone and when I got home from work today it had arrived! The hoodie itself is feels so soft, fits great and the quality is amazing. Now considering buying a different color! Thanks IO!

R.D.

02/08/2023

Summit Zip Hoodie

New Running Long Sleeve

Only used a couple of times but it’s great. Comfortable fit keeps me warmer than a t shirt and the thumb holes help keep fingers warmer on frigid hills mornings. Time will tell for durability. Love the colour (mint I think)

colin green

01/23/2023

Ultra Crew Neck

No Show Socks

Most comfy socks I’ve ever worn - love wearing them

Jules D

01/22/2023

No Show Socks

Altitude Crew Neck