Material: 59% Elasterel, 41% Polyester Microthread ThreadBorne material is created from an upgraded fiber with a high level of elasticity and recovery without the use of elastomer such as Elastan or Lycra. Women's sports bra in fitted fit. Under Armour Vanish Mid Bra Lightweight Microthread absorbs sweat, dries extremely quickly and gives you the feel as if you are carrying natural material.