When the heat is on grab Carhartt's flame-resistant Work Dry t-shirt. Made of a 5.5-ounce, 48% modacrylic/48% tencel/4% spandex, it's intended for use as a baselayer. Work-Dry material keeps you cool and comfortable as it wicks away moisture from your body. Anti-odor control keeps you fresh all day long. It features stretchable, spandex rib-knit fabric with side-seamed construction and a square hem.