ghd Rehab Fine Hair Thickener spray is a heat-activated leave-in treatment designed to provide an instant thickening effect for visibly fuller hair. Its advanced, lightweight formula for a strand thickening effect¹ works by increasing the diameter of each strand, resulting in instantly thicker and fuller hair². Activated by heat and designed to work best with the ghd Duet Blowdry, or any ghd Helios Hair Dryer and ghd Hair Straightener, this treatment is perfect for fine or thin hair types. It plumps each strand while helping to maintain the hair’s natural condition, leaving it looking and healthier-feeling¹ with added body and bounce. 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 styling with the heat of your ghd tools to reveal fuller, thicker-feeling hair. What's inside: Contains ghd Heat protection Biopolymer: Hair conditioning agent promotes hair density.