X-TempTM technology is designed to adapt to your temperature and activity to keep you cool and dry for all day comfort.Touch of spandex provides stretch for move-with-you comfort.Moisture wicking technology keeps you cool and dry.Leg bands that won't ride up guaranteed.Comfort Flex® waistband keeps its shape wash after wash.Tag-free for itch-free comfort.Assorted can be all black, all grey or a combination of both.Convenient 4-pack includes 1 free bonus brief.