Home / Products / Altitude Briefs

Altitude Briefs

Name: Altitude Briefs
Brand: ioMerino
SKU: 27-302-01-02
Price: 50.00 AUD
Availability: OutOfStock

7 reviews

Size Guide

All size charts

ioMerino Size Guide

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 charts below are general and 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 take a look at our recommendations below.

For further assistance with sizing, contact us here.

If for some reason you are not 100% satisfied with the size you chose, we’ll happily offer an exchange, refund or store credit on any non-sale garments. For more about our refunds and exchange policy, click 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+

Men'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	47.4	51.2	55	58.8	62.6	66.4
Torso Length	65.9	68.5	71	73.5	76.1	78.6
Sleeve Length	50.2	52.1	54	55.9	57.8	59.7

Men's Summit Easy Fit Hoodie

Measurements in cm.

Measurements include ribbed hem.

Sleeve length from shoulder to cuff.

	XS	S	M	L	XL	XXL
Pit to pit	49.4	53.2	57	60.8	64.6	68.4
Torso Length	68.9	71.5	74	76.5	79.1	81.6
Sleeve Length	74.2	76.1	78	79.9	81.8	83.7

Men's Tracksuit Pants

Outside Leg measurement (including waist band).

		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

Men's Pace Compression Leggings - Original

Outer leg length measure from top of waist to ankle.

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	58.9	64	69.1	74.2	79.2	84.3
Hips	68.9	74	79.1	84.2	89.2	94.3
Outer Leg	90.3	93.5	96.7	99.8	103	106.2

Men's Stride Track Pants

Leg length measurement includes ankle cuff.

	XS	S	M	L	XL	XXL
Waist	70.4	75.2	80	84.8	85.6	94.4
Hips	82.4	87.2	92	96.8	101.6	106.4
Leg Length	81.6	82.3	83	83.7	84.4	85.1

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

Women's Size Chart - Altitude '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

Women's Size Chart - Universal, Ultra, and Horizon '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 Summit Easy Fit Hoodie

Measurements in cm.

Measurements include ribbed hem.

Sleeve length from shoulder to cuff.

	XS	S	M	L	XL	XXL
Pit to pit	44.4	48.2	52	55.8	59.6	63.4
Torso Length	62.9	65.5	68	70.5	73.1	75.6
Sleeve Length	68.2	70.1	72	73.9	75.8	77.7

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 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

Women's Freedom Sweatpants

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
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
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
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
Leg Length	10.5	13	15.5	18.1	20.6	23.2

Socks

All sizes are given in US Sizing

	Men's	Women's
S	4 - 6	5.5 - 7.5
M	7 - 10	8.5 - 11.5
L	11 - 14	12 - 15.5

Pace Arm warmers

Measurement given for bicep width and arm warmer length. Measure around the fullest part of your upper arm in a relaxed position.

Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.

Approximate measurements only.

	Bicep	Arm Warmer Length
XS	27 - 28 cm	45 cm
S	29 - 30 cm	46.5 cm
M	31 - 32 cm	48 cm
L	33 cm +	49.5 cm

Gloves

Hand Length - Measure from the top of your middle finger to the base of the palm.

Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.

Pace Gloves:

S	16 cm
M	18 cm
L	20 cm

Skull Cap

To measure your head circumference, take a sewing measuring tape and wrap around your head so that the measuring tape winds just above the ears, in the middle of your forehead and in the centre back of your head.

Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. Approximate measurements only.

	Head circumference
S/M	50-60 cm
M/L	60-70 cm

For further assistance with sizing, contact us here.

$50.00

or make 4 interest-free payments of $12.50 fortnightly with More info

Colour

Black

Rust

Size

XXL

Qty

Notify me when this product is available:

DETAILS
SIZE & FIT
BEST FOR
FABRIC - ALTITUDE

DETAILS

Don't ruin great layers with average undies. Our best-selling lightweight Altitude Merino Underwear now come in briefs! Rest assured, they're every bit as soft, lightweight, warm and comfortable as the rest of our high-performance thermal layers, offering superior performance to keep you warm and comfortable when you need it the most.

Tag-free labels, flatlock stitching and a flexible, ultra-soft ioMerino elasticated waistband help eliminate chafe and bulk and maximize comfort and a self-fabric fly adds both comfort and function. Say goodbye to ordinary undies, and hello to the new Men's Altitude Merino Briefs.

SIZE & FIT

True to size. Model wears size small. Model specs - height 173, chest 99cm, waist 76cm.

Self fabric real fly. Mid rise.

Designed to fit perfectly under our other layers.

Size Guide.

BEST FOR

Everything!

FABRIC - ALTITUDE

170gsm lightweight

96% superfine Australian Merino

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

A MicroMerino® Fabric.

My fav undies

Well made, natural and a supportive feel!
Will be my go to undies from now on

Rad undies!

I’ve been searching for natural fibre jocks for running, found just what I need in “io”, supremely comfy, a “barely there” fit and so far, chafe free! Highly recommended!

Great knickers

I recently purchased two pairs of these and after only one day to try them out I will grab another pair. So comfy , especially the very soft stretchy leg hems. No chafing, YAY

Almost perfect

I love wool undies. With wool you only need one pair (ha ha, but almost true!). These are great quality. My only quibble, like all or most jocks, the elastic at the top of the legs is just a little tight for me.

Excellent undies

Top quality undies. They are thoughtfully designed for the male body which makes them very comfortable to wear. Nothing is too tight or too loose on these underpants.

Super comfy

Just purchased a couple of pairs of briefs - so comfortable, I’ve been wearing them every day. Hope they prove to be durable as well.

Fabulous to hear David!

1 2

ioMerino Horizon Crew

I love this top. The fit is excellent and the weight is perfect for winter or summer wear. It breaths, is super comfortable and looks fantastic.

Love them!

They are great

Comfortable, great quality

Very comfortable and soft, good quality and fit.

Very comfortable

Soft and very comfortable, nice and warm. Great quality.

Note (as is shown in the images) it comes down to your thighs, so it keeps your backside warm but can bunch up a little in the front when you sit down. A typical compromise in a hoodie, personal preference whether you like it to end at your waist or further down.

Two great brands and an iconic event

If my club sells a great running top I’ll wear it even if I can’t run an ultra marathon.
With the Yurrebilla Ultra Tee, SA Road Runners Club has paired the iconic gum blossom images we love with the tried-and-true comfort, durability and functionality of IO Merino's Ultra Tee.
The printed material is timeless so your investment will stay relevant for years to come.

Currency

Altitude Briefs

BENEFITS OF MERINO

LIGHTWEIGHT

THERMO REGULATING

SUPER SOFT & COMFORTABLE

BREATHABLE

MOISTURE WICKING

ODOUR RESISTANT

NATURAL

ETHICALLY MADE

Customer Reviews

What layer is right for you?

what would an Australian company know about cold weather?

Instagram

Let customers speak for us

Currency

Altitude Briefs

All size charts

ioMerino Size Guide

Men's General Size Chart

Men's Summit Zip Hoodie

Men's Summit Easy Fit Hoodie

Men's Tracksuit Pants

Men's Pace Compression Leggings - Original

Men's Stride Track Pants

Women's Size Conversion Chart

Women's Size Chart - Altitude 'Contact Fit'

Women's Size Chart - Universal, Ultra, and Horizon 'regular fit'

Women's Summit Zip Hoodie

Women's Summit Easy Fit Hoodie

Women's Stride Tracksuit pants

Women's Yoga Pants

Women's Freedom Sweatpants

Women's Pace Compression Leggings - Original

Women's Pace Compression Leggings

Women's Pace 3/4 Compression Leggings

Women's Pace Bike Shorts

Socks

Pace Arm warmers

Gloves

Skull Cap

BENEFITS OF MERINO

LIGHTWEIGHT

THERMO REGULATING

SUPER SOFT & COMFORTABLE

BREATHABLE

MOISTURE WICKING

ODOUR RESISTANT

NATURAL

ETHICALLY MADE

Customer Reviews

What layer is right for you?

what would an Australian company know about cold weather?

Instagram

You may also like

JOIN THE CLUB

Let customers speak for us