Altitude Crew Neck

Fabric Guide Size Guide

Women'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 then we recommend you take the size up.

For further assistance with sizing, contact us here.

Women's Size Conversion Chart

	XS	S	M	L	XL
Australian	6-8	8-10	10-12	12-14	14-16
US	2-4	4-6	6-8	8-10	10-12
European	34-36	36-38	38- 40	40-42	42-44

Altitude Range - 'Contact Fit'

The Altitude range is designed to be a tight, but comfortable, fit. If you size up it will give you a little extra room, but it will still hug your body as that’s what this range is designed to do. If you want a looser fit consider the Ultra or Universal range.

		XS	S	M	L	XL	XXL
Bust	inch	30-32	32-34	34-37	37-40	40-42	42-45
Bust	cm	76-82	82-88	88-94	94-100	100-107	108-114
Waist	inch	24-26	26-28	28-30	30-32	32-35	35-38
Waist	cm	58-64	64-70	70-76	76-82	82-89	89-96
Hips	inch	34-36	36–38	38-40	40-42	42-44	44-47
Hips	cm	84-90	90-96	96-102	102-108	108-115	115-122

Universal, Ultra, and Horizon Range - 'Regular Fit'

These garments are designed true to size, but going up a size in the Ultra will give it a slightly looser fit, whilst remaining sporty. The Universal and Horizon are already designed as a more casual fit.

		XS	S	M	L	XL	XXL
Bust	inch	29.5–32.5	32.5–35.5	35.5–38	38–41	41–44.5	44.5–48.5
Bust	cm	75-82.5	82.5-90	90-96.5	96.5-104	104-113	113-123
Waist	inch	23.5–26	26–29	29–31.5	31.5–34.5	34.5–38.5	38.5–42.5
Waist	cm	60-66	66-73.5	73.5-80	80-87.5	87.5-94.5	97.5-108
Hips	inch	33–35.5	35.5–38.5	38.5–41	41–44	44–47	47–50
Hips	cm	83.5-90	90-97.5	97.5-104	104 -111.5	111.5-119.5	119-127

Women's Summit Zip Hoodie

Measurements in cm.

Measurements include ribbed hem.

Sleeve length from pit to hem.

	XS	S	M	L	XL	XXL
Pit to pit	41.4	45.2	49	52.8	56.6	60.4
Torso Length	60.5	63	65.5	68.1	70.6	73.2
Sleeve Length	47.9	50.5	53	55.5	58.1	60.6

Women's Stride Tracksuit pants

Measurements do not include the ankle cuff.

Please keep in mind the style of these pants is slightly drop crotch.

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Leg Length	56.4	57.6	58.8	60	61.2	62.4

Women's Freedom Sweatpant

Outside leg measurement includes waist band.

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	68.4	73.2	78	82.8	87.6	92.4
Hip	94.4	99.2	104	108.8	112.6	118.4
Outside Leg	95.6	96.8	98	99.2	100.4	101.6

Women's Pace Compression Leggings - Original

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	60.5	63	65.5	68.1	70.6	73.2

Women's Pace Compression Leggings

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	60.5	63	65.5	68.1	70.6	73.2

Women's Pace 3/4 Compression Leggings

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	42.2	44.8	47.3	49.8	52.4	54.9

Women's Pace Bike Shorts

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	10.5	13	15.5	18.1	20.6	23.2

Women's Yoga Pants

Measurements in cm.
Outer Leg Length includes from the top of the waist to the bottom of the pant leg.

	XS	S	M	L	XL	XXL
Waist 1/2 measurement	34	36.5	39	41.5	44	46.50
Hip 1/2 measurement	40	42.5	45	47.5	50	52.5
Outer Leg Length	106.8	108	109.2	110.4	111.6	112.8

$110.00

or make 4 interest-free payments of $27.50 fortnightly with More info

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 Women'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. New and improved slightly shorter length.

Thumb loops

True to size.

Model wears a size small in Dark Khaki.
Model specs - height 167cm, chest 78cm, waist 63cm, hips 81cm.

Model wears a size medium in Moroccan Blue, Gothic Grape, and Gothic Grape / Pink.
Model specs - Chest 90cm, waist 70cm, hips 95cm.

Model wears size small - Green.
Model size 6-8, height 170cm, chest 81cm, waist 63.5cm, hips 89cm.

Model outdoors wears a size medium in Bright Rose.
Model in studio wears a size small in Bright Rose.
Model specs - size 8-10, height 170cm, chest 80cm, waist 67cm, hips 93cm.

Model is 5'10"" and wears size small in Raspberry, Blue, Charcoal Marle.

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

So comfy and warm. I am wearing it all the time underneath everything! Warm yet not bulky.

Love it!

This top is very warm yet thin enough to be worn under a fitted jacket. I have purchased 2 to date and am more than happy with the size and warmth.

total warmth and comfort

Love this merino wear and the delivery was really prompt - lucky me as its been cold!

Soft and WARM

Excellant product - will be ordering more in the future

Excellent quality

Wardrobe essential

I bought this for chilly morning dog walks but it's quickly become my 'wear every day' top. Comfy under a jumper or even on its own. The raglan sleeves mean no itchy seams under my arm. I'll be getting more of these - it's an essential top for autumn/winter. Ethics and transparency are amazing (I only purchase from ethical and sustainable businesses).

1 2 3

Instagram

Great t-shirt for thru-hikers

I have been wearing my ioMerino t-shirt everyday for over 70 days on the Appalachian Trail thru-hike. It still looks and feels like new. I absolutely love it. It’s great fit, washes very well, doesn’t hold the hiker smell 😊, holds its shape even when wet, fast drying and most importantly super comfortable for any type of weather. Highly recommend. I might get the sleeveless shirt for the summer period as a second shirt.

H.P.

05/28/2023

ioMerino

Universal Long Sleeve Tee - Wise Women Walking

I love my universal long sleeve tee. I have worn it on numerous long hikes and have found it to be fast drying if caught in light drizzle or when sweaty. On a cool day it is fine on its own, or under other clothes if cold. Perfect for when the weather is warmer too, plus protects arms from the sun. I love the dazzling blue colour too.

Cherie

05/23/2023

Universal Long Sleeve - Wise Women Walking

Great products

I’ve been wearing ioMerino since their launch and used to work in the wool apparel industry. Fantastic company and product- I still have base layers from 2008 that have worn incredibly… great ti see them evolving and improving. The performance aspect is excellent.

Ben Lyons

05/17/2023

Altitude 'Mongrel'

My new favorite sports bra

I am between sizes so went with the larger size and the fit is perfect. Very comfortable!

Amanda Lavallee

05/16/2023

Altitude Crop - Ready For Adventure

Perfect Trackpants

Have just ordered another pair in a different colour. These have fast become my favourite trackpants. I've worn these walking my dogs and they're warm but the fabric is so soft, light and breathable! Well done IOMerino! Awesome. I seriously don't want to take them off and they're stylish enough to wear out. Keen to try them on my next hike that's how much I love them!

Tania Dunne

05/13/2023

Stride Tracksuit Pants

Lightweight warmth

This is fantastic for cold weather running. The zip is so handy for adjusting the warmth as I warm up. The neckline is cosy when starting out. I team this with an IO tank top and it works perfectly on a 1 degree morning!

Fiona B.

05/11/2023

Ultra Zip

Love this top!

The fabric in this singlet is incredibly soft. I like the cut too - good coverage (neckline, chest and length) if it’s cold but not too much. Highly recommend.

Fiona B.

05/11/2023

Ultra Tank

Ultra Happy

I have found the Ultra Trunks to be very soft, supportive and comfy. The sizing is accurate. Perfect for my bushwalks. I just about live in merino.

Philip Pascoe

05/08/2023

Ultra Trunks

Altitude Full Brief

Very light & comfy for a curvy body. Soft & not itchy. Don’t ride up when walking.

Hayley

05/03/2023

Altitude Full Briefs

Perfect for a winter music festival

I purchased my grey beanie to take to Mt Gambier for Generations in Jazz. It is going to be perfect for the chilly weather. Thanks friends at IO.

Jenni Watkins

05/03/2023

Ribbed Beanie

Pretty much perfect

I've had a few ultra shirts, and loved them. These are less fitted, and are better every day shirts. I don't really see any reason to buy a different shirt ever again.

Duncan

04/25/2023

Universal Tee

Perfect pants.

I usually buy another brand but thought I would give IoNerino a go. I certainly don't regret my decision. Perfect fit, perfect feel and quality. Will be buying another soon.

Charles Farrugia

04/22/2023

Glacier Tracksuit Pants

Neck Warmer

Works so well and keeps my old neck very warm

Jane Heyndyk

04/17/2023

Neck Warmer - TRSA Five Peaks 2023

New Favourite Top

Love, love it

Jane Heyndyk

04/17/2023

Ultra Crew - TRSA Five Peaks 2023

Comfortable

True to size. Comfortable, soft merino fabric. Holds size after gentle wash.

Lyn Mackaway

04/06/2023

Universal Nature Tee

Altitude Crew Neck