Runderwear Review: Anti-Chafing Running Underwear Tested (Runderwear Discount Code)
If you’ve ever finished a run dealing with chafing or irritation, you’ll know how uncomfortable the wrong underwear can be. After trying countless options over the years, I finally landed on Runderwear, a brand designed specifically to solve this exact problem.
This is my honest, unsponsored Runderwear review based on wearing their underwear across runs, workouts and everyday training.
If you’re thinking of trying Runderwear, use code CHLOEH15 for 15% off!
What Is Runderwear?
Runderwear is a UK brand that specialises in performance underwear made for running and high-sweat workouts. Their products are designed to reduce friction, prevent chafing and stay comfortable even on longer runs.
The range includes running briefs, thongs, boxers, bras and socks, all made with a focus on seamless construction and breathable fabrics.
What Makes Runderwear Different?
Designed to prevent chafing
The main reason people choose Runderwear is to avoid chafing. The seamless design and soft technical fabric are intended to reduce rubbing in areas that are most prone to irritation during running.
Lightweight and breathable
Runderwear uses moisture-wicking fabrics that help keep skin dry when you sweat. This makes a noticeable difference on warmer runs or harder training sessions where regular underwear can feel uncomfortable very quickly.
Built for movement
Unlike everyday underwear, Runderwear is designed to move with your body. It stays in place while running and does not bunch up or dig in, which is especially important when wearing tight leggings or shorts.
My Honest Runderwear Review
Fit and comfort
I first tried Runderwear because I was fed up with chafing on runs, especially over longer distances. The first thing I noticed was how soft the fabric felt compared to standard underwear.
I personally swear by the Runderwear thongs. They sit comfortably under running tights, feel secure and completely disappear once I start moving. I do not notice them at all during runs, which is exactly what you want.
I actually find Runderwear undies so comfortable that I wear them for other activities like gym workouts or hiking.
Performance during runs
I’ve worn Runderwear on everything from short training runs to longer sessions, and I haven’t experienced any rubbing or irritation since switching. They stay in place and feel breathable even when I’m sweating heavily.
I also wear them to other workouts like infrared pilates and Barry’s classes, where heat and movement would normally cause discomfort with regular underwear.
Durability and washing
One of the biggest positives for me is how well Runderwear holds up over time. After lots of washes, mine have kept their shape, softness and elasticity. They still feel just as comfortable as when I first bought them.
This is something I haven’t found with cheaper alternatives, which often lose their fit or start irritating the skin after a while.
Under leggings and running tights
Because they are seamless and low profile, Runderwear works really well under tight running leggings. There are no visible lines, no bunching and no need to adjust mid-run.
That peace of mind is especially important on race days or longer runs when you want to focus on performance, not discomfort.
Things to Consider Before Buying
Price
Runderwear is more expensive than standard underwear (£22 for a thong) which can be off-putting at first. However, if you run regularly and value comfort, the durability and performance make them feel worth the investment.
Choosing the right style
Fit can be personal. I love the thong style, but others may prefer briefs or boxers depending on body shape and distance. It may take some trial and error to find the style that works best for you.
Who Runderwear Is Best For
Runderwear is a good choice if you:
Run regularly and want to prevent chafing (don’t we all?)
Want underwear that stays put during movement
Prefer technical fabrics over cotton
Are looking to invest in durable gear that won’t wear out within weeks
Is Runderwear Worth It?
In my experience, yes. If chafing has ever distracted you on a run or left you uncomfortable afterwards, Runderwear is genuinely worth trying. The comfort, fit and durability make a real difference when you train often.
You can currently get 15% off Runderwear with my discount code CHLOEH15 here.
Frequently Asked Questions About Runderwear
Does Runderwear stop chafing?
Based on my experience, yes. I haven’t had any chafing issues since switching to Runderwear, even on longer or sweatier runs.
Is Runderwear good for long runs?
Yes. I’ve worn it on longer runs without any irritation or discomfort.
Are Runderwear thongs comfortable?
I find the thongs very comfortable and discreet under running tights. Fit can be personal, but they work really well for me.
Can you wear Runderwear for other workouts?
Yes. I wear mine for pilates and gym classes as well as running.
Is there a Runderwear discount code?
Yes! Use code CHLOEH15 to get 15% off your order!
Final Thoughts
Runderwear does exactly what it promises. It provides comfortable, chafe-free underwear that performs well during running and high-intensity workouts. While it costs more than everyday underwear, the performance benefits and longevity make it a solid investment for runners.
If you value comfort on your runs and want underwear you don’t have to think about, Runderwear is well worth considering.
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