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Altitude Boxers - Ready for Adventure

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

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Stone
Black
Stripe
Forest Marle
Thyme
XS
S
M
L
XL
XXL

Don't ruin great layers with average undies. Our best-selling lightweight Altitude Merino Underwear offer 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 Men's Altitude Active Merino Boxers.

True to size. Model is 6'2" and wears size medium.

Self fabric real fly. Mid rise. 

Designed to fit perfectly under our other layers, they are leaner, firmer, active style, with less fabric in the legs and crotch.

Size Guide. 

Everything! 

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 18 reviews
83%
(15)
11%
(2)
6%
(1)
0%
(0)
0%
(0)
f
f.j.
just the first

I own wool boxers from four manufacturers. The one from ioMerino are my favorite. I will definitely add additional products from ioMerino!

C
C.H.
Another great product

In my 8th year of the process of switching all my important gear to wool. IO Merino is definitely the best brand of the 5 brands I have tried. I highly recommend this company in general and these boxers in particular!

Thanks for your review Casey!
E
E.L.
BOXER COMFY

Super comfy...
waist band a little broader, (maybe better)... it felt a little cutting for 1st few wear....

For those who prefer Clingy boxers...this isn't for you.

Thigh feels snug but not tight.
(maybe l have skinny legs🐦)

Am always on the lookout for crazy colors....

B
B.
Great boxers

The boxers are fantastic at keeping you dry & if they do get wet they dry out very quickly and they are really comfortable to wear as well.

J
J.V.
Comfortable but worries about durability

I bought 3 boxers, these are my first ioMerino boxers. Importing them to Europe made them a bit expensive, but I like them.
They have a good length, are a bit loose fitting compared to the cotton boxers I have from other brands, but overall I like the fit.
They are soft and comfortable to wear, because of the longer length they don't bother during a run whereas shorter boxer ride up and start rubbing.
I am a bit worried that they fabric will start thinning quickly as I some chafing on the fabric at the inside of the thighsand this only after several hiking trips and some runs.
At the moment they are worth their money, now I need to see if they will last.

N
N.
Excellent

I bought these for my husband who thinks they are great. He finds them super comfortable to wear, quick drying and there is no chafing!

Thank you for taking the time to give these a review Tash! So glad to hear your husband is enjoying them... I've heard the Women's Zodiac Briefs are pretty great too! ;)




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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 - 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: