Men's Running Briefs | Runderwear™ – Runderwear AU

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


Runderwear™ Men's Running Briefs are the classic fitting favourite of many runners and are perfect under shorts with inner lining that causes chafing.

  • Chafe-free running, guaranteed
  • 360° seamless technology design
  • Breathable, moisture-wicking construction
  • Lightweight and durable technical fabric
  • 92% polyamide, 8% elastane - machine washable at 40°


  • S
  • M
  • L
  • XL
  • XXL

Colour: Black

  • Black
  • Blue
  • Navy

The Runderwear™ Men's Running Briefs are designed to provide exceptional fit, feel and support during your run. Our award-winning underwear will keep you chafe-free - guaranteed. Constructed using 360° seamless technology, which means there are no side seams or tags, resulting in less irritation against your skin. Carefully positioned micro-perforations make the fabric breathable, optimising airflow and core temperature control. Lightweight, technical fabric is moisture-wicking and removes sweat quickly from your skin to keep you dry.

Size Guide

CM 76-81 81-86 86-91 81-96 96-101
INCHES 30-32 32-34 34-36 36-38 38-40
Fabric Composition and Product Care

Fabric Composition:

92% Polyamide
8% Elastane 

Product Care:

  • Warm machine wash up to 40°
  • Wash with similar colours
  • Do not tumble dry
  • Do not soak, bleach or dry clean

Rundercare Help and Advice:

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


Runderwear™ Delivery:

FREE worldwide delivery on all orders over $70


  • FREE worldwide delivery (Royal Mail 2nd Class, non-tracked) on all orders over $70
  • Royal Mail 1st Class, non-tracked: £1.95
  • Royal Mail 1st Cass, tracked: £3.95
  • Guaranteed next working day delivery*: £4.95

*Orders must be placed before 3pm Monday to Thursday to ensure next day delivery

International - EU

  • FREE worldwide delivery (Royal Mail International Parcels, non-tracked) on all orders over $70
  • Royal Mail International Parcels, tracked and signed: £4.99


International – ROW

  • FREE worldwide delivery (Royal Mail International Parcels, non-tracked) on all orders over $70
  • Royal Mail International Parcels, tracked and signed: £6.99


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 512 reviews
Oldl and slow
running in comfort

comfortable product, no longer a need to grease before a long run.

Thankyou for your feedback, Great to hear that you are loving the Runderwear Briefs. We love to hear this.

Paul Widdicombe

Men's Running Briefs

Thankyou for your 5 stars this is greatly appreciated!

Tommy H
Men's running briefs

An excellent purchase. very comfortable even for long runs.

Great to hear that you are loving the Runderwear Briefs and they are providing you with the comfort that you had hoped for! Happy Running.

Comfortable and no chafing :-)

I bought these as normal boxers were giving chafing issues. Runderwear is not sexy, but very comfortable and supportive. Best underpants for running i've ever owned.


I love running in these undies. The quality, performance, and comfort is fantastic. My only negative comments are that they sit very high on the hips (a little like grandad’s old Y-fronts) which means the elastic sits directly in line with or above the waistband of my shorts, doubling up on the amount of fabric/elastic in the same area. It also means if you’re wearing them with normal clothes they ride up above the waistband of your trousers. If they were cut an inch lower I think they’d be little more comfortable and practical for other purposes. They are also a little warm and I don’t wear them on hot/humid days. A lower cut and more ventilated option would be fantastic but these are only minor observations. Do yourself a favour and get some!

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.