Not your ordinary underwear—the Boxerjock® 9" boxer briefs are built for all-day athletes.

WHAT'S IT DO? When UA introduced the O Series Underwear, all other men's athletic underwear was rendered obsolete. The Men's O Series Boxerjock® 9" boxer briefs are built from our smooth, sleek HeatGear® fabric for the best performance. UA's signature Moisture Transport System to keep you cool, 4-way stretch to keep you moving, and anti-odor technology to keep you fresh. Forget your old boxer briefs that bunch up, wear out, or lose shape. The Men's O Series Boxerjock® underwear stretches, recovers, and fits exactly how you want it to.

• Lightweight, smooth HeatGear® fabric and mesh fly panel provide all-day comfort
• Lightweight, 4-way stretch fabrication improves range of motion and dries faster
• Signature Moisture Transport System wicks away sweat to keep you cool, dry, and light