GHD Rehab Fine Hair Thickener sprayA heat activated leave in thickening treatment, ghd Rehab Fine Hair Thickener spray features an advanced, lightweight formula for a strand thickening effect increases the diameter of each strand delivering instantly thicker and fuller hair an instant thickening effect for visibly fuller hair. How to use: Shake well before use. Mist generously onto towel dried hair, focusing on the mid lengths and ends. Comb through evenly, then activate by drying and