Densify 03 replaced the red one. DENSIFY HF 03 is the most hydrating & nourishing formula out of the 3.This ultra-moisturising leave-in treatment for fine or thinning hair is perfect for dry, brittle, coloured, damaged hair & scalp types. Its unique nourishing formula combines elevated levels of amino acids, MSM & botanical bio-actives to mend & strengthen weak or damaged hair strands & scalp while delivering maximum hydration.