Flex Hairspray - Forget what you know about hairspray. Living Proof Style Lab Flex Hairspray is a medium-hold spray that can be used to set, style and finish without stiffness - for touchable, brushable styles.Style Lab Flex Hairspray is powered by Flexible Web Technology, which features a blend of firm and flexible polymers optimized to set, style and finish on damp or dry hair. Vitamin B5 adds softness and shine, while conditioning emollients boost brushability. Because we believe you should a