At Runderwear™ we make Award Winning chafe-free running underwear that you can rely on, from 5k to Ultra distances. Available in a variety of styles, sizes and colours, we'll keep you friction free, mile after mile.

Enter our competition below to be in with a chance of winning 30 prizes worth over £4,000 in total, including the latest Garmin GPS watch! Simply enter your details below and we'll contact the winners when the challenge ends on 27th May 2018. 

2 lucky winners will receive all they need to train and race in comfort:
• A Garmin GPS running watch worth £350
• The full Runderwear™ System 1 year package comprising;
Base Layer, hat, headband, a pair of deluxe Merino Runderwear™ for winter, a pair of regular Runderwear™
for summer, 2 styles of anti-blister socks and 1 pair of graduated compression socks.

Runderwear™ System 1 Year Package (see above for what this contains)

20x prizes of a pair of chafe-free running underwear each.

Everyone who joins the Runderwear™ challenge will receive a 25% discount voucher. Just enter the competition below and you'll receive your code to use at checkout!

Browse our entire collection of chafe-free running underwear for women and men


   T&Cs here


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performance underwear
★ Read Our Reviews

Let customers speak for us

243 reviews

These socks are the best running socks I have ever purchased

Good service, product is fit for purpose

Service is great, and the boxer shorts are good for running and so the job they are designed for. Little disappointed that they are not ethically sourced, they have a cheapish feel to them which was a surprise.

Thank you for your feedback Duncan. Runderwear's range of seamless underwear has sustainability benefits over cut and sew garments by reducing wastage of fabric at manufacturing stage. We are testing new fabrics that have been made using sustainable fibers and aim to bring these into our range in the near future. All our factories are quality control checked to the highest standard and our small team regularly visit them and are satisfied that working conditions are ok. We are somewhat surprised you find the pants have a cheapish feel to them. But maybe you mean that the material is not thick and when you stretch it and look up-close it has an almost gauze-like appearance; this is the nature of the product and gives it the moisture wicking properties. We hope you will like using them and will realize how comfy they are.



Super comfy and stay in place. U.K. size 10 and ordered small.

Women's Running Long Shorts
Cassandra Kay-Lewis
At last... chaff free running.

Had just about given up with the belief there were running shorts out there that don’t chaff. Purchased the long shorts, and have to say they are wonderful. They are stable, breathable, comfortable and total chaff free.
I would like to highlight I was under the impression that these were “proper” shorts, however they could possibly be described as a base layer shorts. Some form of lightweight run shorts are recommended to wear over them to cover your modesty. Wearing my lightweight run shorts over the top of them didn’t detract from the long shorts benefits.
I typically run up to 21km.