SAXX Ultra Boxer Fly features a viscose fabric made from natural fibers derived from plant cellulose that creates a moisture wicking and breathable, soft blend. Every pair of SAXX features a combination of technology and innovation that makes them the most comfortable, high performance underwear ever made. The Articulated Front Pouch and Patented Internal Mesh Panels combine to give you the room you need, while preventing unwanted friction. Each pair also features a Moisture Wicking Waistband that keeps you dry when the temperature rises. Lastly, we use a wide range of cutting edge, technical fabrics, each with a specific feature to enhance your wearing experience.