Wavy hair needs a balance of moisture and lightness to maintain its natural movement. A sulfate-free shampoo cleanses without weighing it down, and a lightweight conditioner moisturizes without greasy residue. Use a styling mousse , texturizing spray , or lightweight gel to define your waves while maintaining volume. To limit product buildup, a monthly clarifying shampoo is recommended. Air-dry or diffuse your hair for a natural wave effect. A lightweight hair serum or dry oil adds shine and protection.