The Active Boxer BriefBamboo, rebuilt for an active lifestyle.Made from a 90% bamboo, 10% spandex blend, the Active Boxer Brief takes everything bamboo does well and adds the stretch and support to keep up with a workout, or just a long day on your feet.+ A new engraved Kumori waistband. Subtle, soft, and built to stay put through any activity.Double the spandex gives the fabric real stretch and recovery. It moves with you and holds its shape, and the 5.5 inch inseam keeps everything supported and in place with zero ride-up.Why bamboo:Breathable. Naturally moves air and wicks moisture, so you stay dry and cool when your body heats up. Exactly when it matters most.Soft. Noticeably softer than cotton, with none of the scratch or stiffness of typical performance fabrics.Odor-resistant. Naturally resists odor-causing bacteria, which earns its keep in a gym bag.