This improved formula rebuilds and strengthens the hair fiber at all levels of hair erosion smoothes and protects the surface while reconstructing the hair fiber intensifying its strength from root to end bain force architecte contains complex ciment cylane 3 which provides the ultimate in hair fiber reconstructing technology to use apply a small amount to wet hair and scalp massage head using palms of the hands emulsify and rinse thoroughly for ultimate results pair with kerastase cime