Interval Boxer Brief - 5"

Proof’s Performance Boxer Brief is designed to be worn all day—and even longer when you need to—with fabric that stretches even at your slightest movement and an anti-microbial finish that keeps it fresh and odor-free. Exceptional flexibility with both horizontal and vertical stretch ensures these briefs move with you in every direction, whether you're at the gym or on your daily commute. The incredible fabric, developed in conjunction with Japan’s Toray Industries, is not only soft and comfortable, but built to retain its shape with industry-leading shape recovery.