Under Armour Performance Tech collection offers technical features and new composition that will give any athlete a serious edge. Mesh channels, half cushion footbed, and new poly/cotton construction means great feeling and fast drying - what you need to succeed. 69% Polyester, 28% Cotton, 3% Spandex Imported Pull On closure Machine Wash Shoe Size: Men 9-12.5, Women 11-13 Under Armour’s mission is to make all athletes better through passion, design and the relentless pursuit of innovation 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.