Under Armour Mesh II Skull Cap Shell: 84%Polyester/16% Spandex Shell: 80% Polyester/20% Sp Imported Where we started? It all started with an idea to build a superior T-shirt 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