Transform fine, flat hair into fuller, thicker-looking locks with the ghd Rehab Fine Hair Thickener Spray. This lightweight, heat-activated styling spray expands each strand to deliver instant volume and density while maintaining natural movement and softness. Formulated with ghd’s exclusive Heat Protection Biopolymer, it shields hair from damage while adding lasting body, shine, and a salon-smooth finish. Ideal for fine or thinning hair, it gives you the confidence of fuller, healthier-looking hair after every blow-dry.