Upgrade your haircare routine with Tresemme Keratin Smooth Serum No.4. Specially formulated with Keratin Bond Plex, this lightweight serum helps reduce visible signs of dryness and frizz while improving smoothness and manageability. It supports hair strength and leaves your strands feeling sleek, soft, and polished—without weighing them down. Ideal for dull, chemically treated, or heat-styled hair.