Under Armour Women's Tech Short Sleeve Running T-Shirt - Medium - Purple 100% Polyester Lightweight UA Tech Fabric - With an ultra-soft, natural feel for unrivaled comfort. UA HeatGear Fabric - Wicks away sweat to keep feet cool, dry, and light. 4-Way Stretch Fabrication - Allows greater mobility and maintains shape. Signature Moisture Transport System - Wicks sweat away from the body, keeping you cooler and drier. Anti-Odour Technology - Prevents the growth of odour causing microbes.