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. Made with an ultra soft cotton/modal blend for all day comfort.Cool Comfort™ wicking fabric keeps you cool for all day comfort.Lay Flat Collar is designed to keeps its shape.Undershirt is designed to stay tucked in for a confident fit.Tag-free for itch-free comfort.Available in a convenient assorted Black/Grey 4-Pack.