Altitude Zip

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
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
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
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
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
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
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

 

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Colour
Stripe
Size

We called this the Stripey range, because, ah, obviously. Then we gave it its very own section because even though it’s made from the same super comfortable fabric as the rest of the Altitude range, when we make the stripey fabric it fits and feels a stripey bit different. Still soft, still comfortable, still true-ish to size, but if you’re used to our other Altitude tops, this one will feel about half a size smaller. Up to you whether you go up a size based on how you want it to fit and feel.

What’s not different is everything else. It’s still designed to fit close to your body for maximum performance. Tight but soft, with plenty of give for extra comfort. The Altitude 'Stripey' Zip 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 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

Model is 5'10" and wears size small in Stripe.

Size Guide. Contact Fit.

Snow Sports

Cycling

Running

170gsm lightweight

96% superfine Australian Merino

4% Elastane - for an easy all-way stretch.

MicroMerino®  Fabric. 

BENEFITS OF MERINO

LIGHTWEIGHT
THERMO REGULATING
SUPER SOFT & COMFORTABLE
BREATHABLE
MOISTURE WICKING
ODOUR RESISTANT
NATURAL
ETHICALLY MADE

Customer Reviews

Based on 12 reviews
92%
(11)
8%
(1)
0%
(0)
0%
(0)
0%
(0)
F
Fleur (Sapporo, JP)

Great quality and looks lovely on. I recommend sizing up. I am normally a medium and bought the large.

Hi there Fleur,

Thanks so much for your feedback. :D

With the Altitude being a Base Layer and having a Contact Fit, it can feel quite clingy, so upsizing can absolutely help if you want a bit less of that.

If you would like more info, feel free to let us know, or we have a fit guide here - https://iomerino.com/pages/our-range

S
Stacy Prescott (Albuquerque, US)
SLP

Awesomeness!

J
Jacqui (Melbourne, AU)
Great fit and love the stripes!

It's just a tiny bit scratchy, but once you've had it on for awhile, it's not noticeable. The fit was exactly as described. First wear was in pouring rain under a not-so-weatherproof jacket - the breathability was perfect. No photos - too wet!

S
Skay (Rockdale, AU)
Quality garment

I had not purchased from IO before but very happy with quality and the quick delivery

J
Jane Coram (Canberra, AU)
My favourite running top for winter

Perfect weight for running in chilly winter mornings. Fits quite neatly but that’s fine for me. Looks great too - I feel super smart when I’m wearing it.

S
Susan Kay (Adelaide, AU)
Super Merino

Absolutely love this lightweight easy to wear top. Looks great with sporty gear and jeans. Stripes look fresh and smart I bought the XL and can wear t shirt underneath.





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Fabric Guide

While Merino is an amazing natural fibre, not all Merino fabrics are created equal. At ioMerino, we make our own fabrics, using only the best quality fibres, and to very specific specifications that make the most of the natural benefits of Merino. All of them are 'Merino rich’. No cheap blends passed off as Merino. No cheaper scratchy fibres or synthetic substitutes to save money. No unethical production. And each fabric is made for a specific purpose. So if you see something with a small amount of elastase or nylon added, you can be sure it absolutely needs to be there to enhance the natural stretch and durability. 

It took every bit of our 140 years of experience in the wool industry to perfect our fabrics, but we think you’ll agree the end result was more than worth the effort.

Ethically Made. Ethically Sourced. Perfectly Natural. 

 

Altitude / Zodiac

Lightweight 170gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric. 

 

Ultra / Universal

Lightweight 160gsm 83% Australian Merino Wool blended with 12% nylon blended for extra durability and 5% Elastane for stretch and comfort.

 

Chaser

Midweight 265gsm 96% Australian Merino Wool with 4% elastane for extra stretch and comfort. A MicroMerino® Fabric. 

 

Summerino - Celsius 

Made from 45% ultra fine MERINO (Ultra Lightweight 150gsm), 45% natural TENCEL (made from sustainably grown wood fiber), and 10% nylon for extra durability. 

 

Summerino - Keystone 

Ultra Lightweight 150gsm 100% Australian Merino Wool. A MicroMerino® Fabric. 

 

Merino Compression

Midweight 280gsm 76% Australian Merino Wool, 15% Elastane and 9% Nylon for extra stretch and compression properties.

 

Vital

Ultra lightweight ribbed 155gsm 100% Australian Merino Wool. A MicroMerino®  Fabric. 

 

Summit

Outer Weight 280gsm Fleece 100% Australian Merino Wool. MicroMerino®  Fabric. 

 

Pinnacle

Midweight 260gsm 100% Australian Merino Wool. A MicroMerino®  Fabric. 

 

Elemental 

Midweight 260gsm waffle texture 100% Australian Merino Wool. A MicroMerino®  Fabric. 

 

Stride / Glacier / Velocity

Midweight 255gsm French Terry 100% Australian Merino Wool. A MicroMerino®  Fabric. 

 

Natural Merino Wool benefits: