Living Proof conditioners moisturize your hair and nourish your scalp without the use of sulfates, silicones or parabens. Are you looking to restore your hair from years of coloring or do you have curls in need of frizz protection? Living Proof Leave-In Conditioner with glycolic acid helps mend damaged cuticles, smooth strands and block humidity throughout the day. As a result, curls appear frizz-free and are left looking more defined. If moisture without heaviness is what your hair needs, Living Proof Full Conditioner contains lightweight ingredients that improve your hair's body, bounce and shine. It also has detangling features which may aid against hair breakage.