Under Armour Women's Fly-By Run Legging 80% Polyester, 20% Elastane Imported Super-light HeatGear fabric delivers superior coverage without weighing you down Signature Moisture Transport System wicks sweat to keep you dry & light Lightweight, 4-way stretch construction improves mobility & maintains shape Anti-odor technology prevents the growth of odor-causing microbes Ergonomic flatlock seams deliver a comfortable, chafe-free fit