Men's Merino Running Boxers | Runderwear™ – Runderwear AU

Men's Merino Running Boxers - ADD ANY 3 ITEMS TO YOUR BAG SAVE 15%* more


Seamless Men's Running Boxers with a 6-inch inseam and silicone leg-grippers - enhanced by the magic of Merino. Experience unrivalled comfort and performance.

  • Responsibly sourced, sustainable Merino with seamless design
  • Naturally regulates temperature in any conditions
  • Anti-bacterial, odour-resistant and removes sweat quickly
  • Super-fine, ultra-soft and non-itchy against the skin
  • As with all Runderwear products: Chafe-free, guaranteed


  • S
  • M
  • L
  • XL
  • XXL

Color: Grey

  • Grey
Runderwear Men’s Merino Running Boxers are designed to deliver unrivalled comfort and performance, with a 6-inch inseam and silicone leg grippers to hold them in place during movement. All the features of our classic Men's Running Boxers - seamless design, breathable, moisture-wicking and of course, chafe-free - enhanced by the magic of Merino; the world's best natural performance fibre


Merino wool comes from Merino sheep, who face scorching hot summers and bitterly cold winters in their natural Australian mountain habitat. As a result, their wool has evolved to have unmatched levels of temperature control - so our Merino range will keep you at the perfect temperature in any conditions

This intelligent, organic fibre also absorbs both odour-causing bacteria and moisture from your body, quickly. It traps the bacteria to make it odour-resistant and it can absorb up to 35% of its own weight before feeling wet, meaning you stay fresh and dry on your run

To prevent overheating the sheep are sheared once a year, so the fibre is sustainable and renewable. The fineness and softness of Merino is measured in Microns – at 18.5 Microns, Runderwear Merino is super-fine – making it ultra-soft and non-itchy against your skin

Fabric Composition:

45% Merino Wool
40% Polyester Thermocool™
10% Polyamide
5% Elastane

Product Care: 

  • Warm machine wash up to 40°C
  • Wash with similar colours
  • Do not tumble dry
  • Do not soak, bleach or dry clean
Size Guide
CMs 76-81 81-86 86-91 81-96 96-101
INCHES 30-32 32-34 34-36 36-38 38-40

Rundercare Help and Advice:

If you need any help or advice, you can contact our Customer Care team, they would love to hear from you!


Runderwear™ Delivery:

FREE delivery in Australia and New Zealand on all orders over $70

Australia & New Zealand

  • FREE delivery (Australia Post Parcel) on all orders over $70
  • For orders under $70 delivery is $9.

Black Friday & Christmas Delivery

We know that delivery services in the US are busier than usual at the moment during this busy period.

Please be patient whilst our delivery partners work as hard and fast as they can to deliver your order to you.

Runderwear™ Returns:

You can return any Runderwear™ Socks, Crop Tops, Support Bras, Base Layers to us within 14 days of purchase and can request a full refund or a product exchange.

Due to hygiene reasons we can not accept returns on underwear including Briefs, Hipsters, G-Strings, Hot Pants, Boxer Shorts and Tri Suits, if they have been worn.

In the unlikely event that your product becomes faulty, you may return your purchase for a full refund or exchange.

Please package your return appropriately and add in a note to let us know whether you require a refund or product exchange. Please pay the postage in full and send to our Rundercare team at the following address:

Runderwear™ Returns
PO Box 5090

Please email our Rundercare team at if you require any further help.

Customer Reviews

Based on 28 reviews
Maurice Hill
Unbelievable Comfort

I was at first a bit dubious about the price of the Merino boxers
but oh my they are worth every penny they are so comfortable,
you just feel like you are wearing nothing at all.
I have tried them out on lots of long Runs and I rate them very highly
and would definetley recommend them to anyone. 10 out of 10 for me.

Thankyou for your feedback, Great to hear that you are loving your Merino Boxers and you find these to be comfortable and worth the money.

Great to hear that you would highly recommend, We love to hear this!

Dick Wood

Do the job perfectly

Thankyou for your feedback, Great to hear that you are loving your Runderwear garments.

Next level comfort

Already had a number of pairs of the normal runderwear boxers but decided to splash out & give the merino ones a try. They haven't disappointed. They're so lightweight & really do take the comfort to a new level that I hardly even feel like they're there. Expensive, but worth it.

Danny Batchelor

Most comfortable underwear there is for running

Dean Jorgensen
Another Great Pair of Running Liners

Definitely nicer than the regular liners, although those are also excellent. Here it is the feel of the material, which is presumably due to the blend; they feel more 'natural'. As advertised, these do not cause chafing, and I run in all kind of conditions, this is fantastic as some 'competitors' also claim no chafing, but clearly fail in practice. The only thing is that they appear to maybe be not as durable as the regular versions. After about six uses, there is pilling around high friction areas, this did not happen with the regular versions until many hundreds of kilometers in. With that said, I am sure they will last long enough to make them worth the money and comfort.

Thank you for your feedback this is appreciated. Great to hear that you are loving the Merino Boxers and you are chafe free. Sorry to hear that they have started pilling, if you email then we will be more than happy to help.

Buy any 3 items from across our store and save 15%.

Promotional discount codes can be used in conjunction with this offer except on Anti Blister socks.

Full details available here.

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