Our best-selling Buck Naked® Underwear comes amazingly close to feeling just as lightweight, easy-moving and pleasing to the skin as, well, wearing nothing at all! In 93% nylon/7% spandex knit, they wick away sweat far more efficiently than cotton, so you stay dry all day. And it's treated to resist odor like no cotton or blend can. Diamond-knit fabric is stretchy for extra ease with a snug fit for support while you work. And now you can get them 3½" longer than our regular boxer briefs to stay put better, not ride up during high activity. If you're working up a storm, go long!