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Athlete running across coastal sand dunes wearing ruhn performance trunks

Move Fast. Stay Comfortable.

TECHNICAL UNDERWEAR ENGINEERED FOR MOVEMENT

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Close-up of ruhn black performance underwear showing waistband detail and textured moisture-wicking fabric

Built to Keep Up.

PRECISION IN EVERY STITCH

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an running uphill on a sandy dune wearing ruhn performance trunks under a misty sky

Made to Move.

DESIGN THAT WON'T SLOW YOU DOWN

DISCOVER

Jason S - Ultra Marathon Runner

ruhn is my first choice for racing. I’ve completed the 100k Taupō and multiple 50k trail races in them with zero chafing or ride-up. Exceptional performance and durability.

Patrick M - Triathlete

Absolutely love them. I am a triathlete with big legs. These are just gold - don't creep up, no chafe etc. Love them. Nice support but not heavy.

Drew - All-Round Athlete

Zero chafing, the right balance of stretch and compression, and fast-drying even through mixed training. I wear them for everything - gym, outdoor workouts, golf, padel, and ocean sessions.

Free standard shipping over $95

30-day money back guarentee

Designed for long runs

Built to move. Designed to last. Discover underwear that never quits before you do.

ruhn anti-chafe performance underwear icon on white background

Anti-Chafe

ENGINEERED ANTI-CHAFE PANELS FOR FRICTION-FREE MOVEMENT—NO MATTER THE DISTANCE

ruhn featherlight icon representing ultra-light performance underwear design

Featherlight

ULTRALIGHT PERFORMANCE FABRIC WITH ADVANCED MOISTURE-WICKING AND QUICK-DRY TECHNOLOGY

ruhn mesh ventilation panel icon representing breathable performance underwear

Maximum Ventilation

STRATEGIC MESH VENTILATION FOR OPTIMAL AIRFLOW AND COOLING