Reveal a calmer, more comfortable scalp with the Kerastase Specifique Soothe & Calm Treatment, specially formulated for sensitive scalps. This intensive 4-week program effectively soothes irritation and enhances scalp health using a unique blend of PS 21, Rhamnose, and AOX Complex. Just three simple applications per week transform your scalp from irritable to irresistible. To use, apply one bottle per session to either dry or towel-dried hair. Gently part your hair and evenly distribute the serum directly onto the scalp. Use your fingertips to massage the formula deeply for full absorption. Remember, there's no need to rinse—simply leave it in to continuously benefit from its soothing properties while you style as usual, ensuring your scalp remains flake-free and nourished all day long.