Layer One is now available in a new bottle and new size! Fantastic formula is the same. A heat-activated bodifier that creates a thicker, fuller, voluminous style. Make this the first step in your styling routine to enhance the feeling of thickness to your locks. Spray on damp hair, then blowdry. The resins in the formula expand when activated by heat and create a thicker feel on each hair strand, creating endless volume once styled.