Saxx 'Nasa' Boxer Briefs. 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.