●100% Other Fibers ●Imported ●Machine Wash ●Super-soft, cotton-blend fabric provides all-day comfort ●Ribbed collar. Knit Fabric ●The technology behind Under Armours diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when its hot, ColdGear when its cold, and AllSeasonGear between the extremes.