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.ComfortSoft® cotton feels soft against your skin.Cool Comfort® fabric wicks away moisture to keep you cool and dry.Tag-free for itch-free comfort.Clean finished bottom hem looks great tucked inside or out.Banded neck and armholes resist wear and tear.Ribbed to help keep its shape.100% cotton; heathers are cotton/polyester.Convenient 4-pack is available in size 2XL in black/grey assorted colors.