Run further, run faster, with runderwear.

Innovative running underwear designed with anti-chafing, breathable, and moisture-wicking fabrics to keep you focused on your goals.
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100% Chafe-Free

Guaranteed. It's what we do.

Loved by Runners

Over 10,000 reviews

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Your Hidden Advantage

Runderwear is the original performance underwear for running. Our mission is to eliminate the discomfort caused by ill-fitting underwear and clothing and create performance running underwear, base layers, running bras and socks that are supremely comfortable and chafe-free.

Our products

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Men's Running Boxer | Grey
$40.00
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Men's Running Boxer | Black
$40.00
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Women's Running Hipster | White
$35.00
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Men's Long Running Boxer | Black
$50.00
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Women's Running Briefs | Fiesta
$35.00
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Women's Balance Sports Bra | Black
$55.00
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Women's Running Briefs | White
$35.00
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Women's Running G-String | Black
$35.00

Specifically engineered for runners, by runners to deliver the ultimate experience in comfort. Durable fabric with 4-way stretch movement allows you to run freely and provides support to your body, making it the perfect first layer against your skin.

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

The World's Best Running Underwear

Featured product

Men's Running Boxer | Black
Men's Running Boxer | Black
Black
Men's Running Underwear
Black
Men's Running Boxer | Black
Men's Running Boxer | Black
Black
Men's Running Underwear
Black

Men's Running Boxer | Black

$40.00 Tax included. Shipping calculated at checkout.
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Running Essentials

What our customers say

Amazing Product

Amazing product, amazing customer service, I can't say enough good things about runderwear. I chafe easily and with runderwear, running is pleasant and easy. Thank you!

Teiler Wap - FR

Fantastic Product

Great service and fantastic product. It’s the most comfortable I’ve ever worn … recommended.

Andrew - UK

Best undies I've ever worn

Best undies I've ever worn, super comfortable, they dont move around, and no chafing!

Sterling Lisle - AU

Very Comfortable

Excellent pants very comfortable. Just bought 2 pairs of the new black pants - even more comfortable than previous versions. Highly recommended.

Andy S. - UK

Blog posts

Marathon Training - Who's In?
June 10, 2021
Simon Lilly
Marathon Training - Who's In?

  It’s an exciting time with the gradual return of...

What's Your Hidden Advantage?
February 01, 2025
Courteney Leigh
What's Your Hidden Advantage?

It's the things you don't see that make the difference....

5 Reasons You Get Blisters: Causes and Treatments
January 10, 2025
Molly Smyth
5 Reasons You Get Blisters: Causes and Treatments

Blisters develop to protect damaged skin and help it heal. They're...