The Wella Invigo Volume Booster Uplifting Concentrate is a lightweight spray formulated to give manageability and shine without weighing down the hair. Bodifying Spring Force Polymers surround the hair fibers and help to create the most voluminous looks during blow-drying. this spray uses cotton, a soft but stable fiber with similar stability and softness needed for voluminous fine hair. This ultra-concentrated booster turns tired flat hair into voluminous bouncy locks.