Effortless straightening for thicker hair With a high concentration of active ingredients, Straight & Smooth Spray for Thick / Coarse hair makes it easy to create a straight, sleek finish in thick or rebellious hair, while protecting from heat damage. Contains the ghd Heat Protection System. Best for… Thick or coarse hair in need of smoothing; creating long-lasting straight hair without frizz or flatness. To use… Apply 4-6 sprays to damp hair before blow-drying, or on to dry hair before using your styler. Style tip… Refresh your style in-between washes by spritzing over your dry hair before using your styler.