Under Armour Women's HeatGear Alpha Legging 80% Polyester/20% Spandex Machine Wash HeatGear Alpha - Lightweight fabric construction that draws moisture away from the skin and dries rapidly, in a lightweight form. Moisture Transport System - Draws moisture away from the skin in to the mid/outer layer to be evaporated. 4-way Stretch Construction - Affords an increased range of motion. Anti-Microbial Technology - Keeps the kit feeling and smelling fresher for longer. Inseam - 7.5cm.