INVIGO Volume Boost with Volume Boost-Blend: Lightweight formulas 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. Cotton is a soft but stable fiber with similar stability and softness needed for voluminous fine hair. Turn tired flat hair into voluminous bouncy locks. Apply to clean, damp hair before applying a mask or conditioner. Leave for 5 minutes and rinse out thoroughly.