Goldwell Dualsenses Bond Pro Duo is specially designed for weak, fragile hair that is prone to breakage. It uses Inter-Amino-Bond-Builder technology that fortifies the hair from the inside out by forming new ionic and hydrogen bonds, while MicroPROtec Complex distributes essential ingredients to protect the hair from colour fade out. This fortifying duo gently cleanses and gives the feel of structure without weight and will protect your hair against further mechanical damage when brushing or combing.