Kerastase Bain Therapiste is designed for hair with an erosion level of 3-4, to help renew limp, lifeless hair and appearance of fibre quality. Kerastase Bain Therapiste has unique jelly-like texture specially formulated with an innovative FIBRA-KAP formula to deliver keratin associated proteins (KAPs) to repair hair fibres and the internal architecture for healthy-looking, hydrated hair. This balm-in-shampoo renews split ends and brittle strands by enveloping hair, increasing strength and protecting from further damage. It is a must have for very damaged and over-processed hair. Kerastase Resistance Therapiste Masque is a thick butter-textured mask that repairs, restores hair, adds strength and boost elasticity to very damaged, over-processed hair. This mask revitalises hair strands and locks in moisture so the hair is left with silky smooth, hydrated look and feel. It contains first of it's kind FIBRA-KAP formula that is enriched with six amino acids to replenish protein and promote strong, healthy hair. Fiber regains strength and elasticity. Prevents future breakage. Repairs and protects from further damage. Friction is reduced during cleansing. Envelopes the hair fibre during cleansing.