Under Armour Men's No Breaks Run 1/4 Zip 100% Other Fibers Imported Insanely soft, smooth fabric for total comfort Shoulder fabric uses UA Microthread technology so it wont cling to you, wont chafe & it stretches without absorbing sweat 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast Anti-odor technology prevents the growth of odor-causing microbes