FreshIQ™ advanced odor protection technology attacks the odor-causing bacteria in your clothing that causes your underwear and socks to smell — so now you can feel fresh all day.X-Temp™ technology is designed to adapt to your temperature and activity to keep you cool and dry for all day comfort.Moisture-wicking fabric for all day comfort.Tag-free for itch-free comfort.Lay Flat Collar keeps its shape wash after wash.Convenient 6-Pack includes a bonus crewneck.