Paul Mitchell's Smoothing Super Skinny Serum is the best hair moisturizing serum that smooth's even the most frizzed hair. This serum is specially formulated to provide a smoothing complex to help repair and protect hair against styling and heat. This serum is designed to be applied before heat treatment to protect and smooth over split ends. Paul Mitchell Beauty Products are designed with expert hair care in mind, without spending the expert price. Paul Mitchells' innovative hair styling products are designed without the use of animal testing. Paul Mitchell Thrives on experimenting, researching and testing their products on humans before delivering its' customers the expert hair care products designed with you in mind.