Performance boxer briefs cut from technical fabric and built for an active lifestyle
Proof’s Inverval 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.
Features
Cut from a technical fabric developed specifically to create high-performing underwear you can rely on for an active lifestyle
Low-power stretch feels like it isn’t stretching at all, but simply moving along with your body like a close-fitting base layer should
Four-way stretch moves with you in every direction
High stretch recovery means the fabric will never get baggy and loose, no matter how much you wear and wash
Anti-microbial finish that fights odors and keeps things fresh, also prevents bacteria from degrading the fabric for a longer life
Plush elastic waistband for comfort
Materials
Four-way stretch fabric from Toray Industries of Japan
89% nylon, 11% elastane
Sizing
The Interval Boxer Brief has a snug, next-to-skin fit
Take your normal size in boxer briefs
For the best personal fit, compare the measurements of one of your best-fitting boxer briefs to the garment measurements below
