Super-soft, cotton-blend fabric provides all-day comfort Loose: Fuller cut for complete comfort The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes Breathable Material – This running shirt is crafted from polyester and cotton; The materials are breathable, preventing overheating and perspiration. Color: red