Matrix Biolage Aqua-Gel Conditioner Smooth Proof 8.5 Ounce 250 Milliliters Biolage SmoothProof Conditioner for frizzy hair provides humidity control and anti-frizz smoothness even in 97% humidity. This lightest conditioning gel technology imparts light-weight, silicone-free, nourishment from roots to ends, perfect even for ultra-fine hair. Detangles and defrizzes hair while providing static control. Fine hair appears smooth and calm with minimized frizz and static.