Transform the appearance of thin, flat hair with the targeted solution of the Redken Acidic Grow Full System Instant Densifying Spray, an advanced leave-in treatment designed to combat low density and reduce breakage from brushing. Fuelled by potent azelaic acid and a five percent densifying complex, this lightweight formula delivers instant root-lifting volume while promoting a balanced, hydrated scalp environment for visibly thicker-looking strands. Spray evenly onto damp or dry hair daily, focusing on the roots to maximise fullness and improve overall hair resilience without weighing the hair down