Built for running, hiking, cycling and training, the Runyon SupraPlush™ 5" Performance Boxer Brief is lightweight performance underwear designed for athletes who demand comfort, support and functional storage. Crafted from silky-smooth SupraPlush™ nylon/spandex performance fabric, these quick-dry, moisture-wicking boxer briefs feature a built-in phone pocket, soft nylon waistband and 5-inch inseam for comfortable support during workouts and everyday wear.

Silky-Smooth SupraPlush™ Performance Fabric

Our signature SupraPlush™ nylon/spandex performance textile provides a smooth, lightweight feel with comfortable stretch that moves naturally with your body. The moisture-wicking, quick-dry fabric helps manage sweat during running, hiking, cycling, gym workouts and other high-intensity activities while providing next-to-skin comfort for extended wear.

Built-In Phone Pocket

A convenient built-in phone pocket provides functional storage for your phone or other small essentials while training. The integrated pocket makes the SupraPlush™ Boxer Brief especially useful when paired with unlined running, hiking and workout shorts, adding supportive performance underwear and secure storage without requiring a permanently attached liner.

Pair With Our Unlined Performance Shorts

Create your own versatile 2-in-1 running short system by pairing the SupraPlush™ Boxer Brief with any of our unlined performance shorts. The separate boxer brief design lets you choose your preferred outer short while adding a supportive quick-dry liner, comfortable stretch and a built-in phone pocket underneath. Wear them together for running, trail running, hiking, cycling, gym training and other outdoor activities — then wash, replace or mix and match each piece independently.

Made for Running, Training & Everyday Performance

The 5" inseam provides athletic coverage and support without unnecessary bulk, while the soft nylon waistband creates a smooth, comfortable fit. Wear the SupraPlush™ Boxer Brief independently as performance underwear or underneath your favorite unlined Runyon shorts for running, trail running, hiking, cycling, strength training, CrossFit, gym workouts and everyday active wear.

Designed & Made in the USA

The SupraPlush™ Performance Boxer Brief is designed, cut and sewn in the United States using Made in USA performance textiles. Its standalone design provides the versatility to pair it with Runyon unlined shorts instead of permanently attaching the liner to a single outer short.