OUAI Fine Shampoo in Beauty: NA. OUAI Fine Shampoo in Beauty: NA. OUAI's Fine Shampoo breathes life into fine, flat hair with strengthening Keratin and nutrient-rich Biotin. Hemp Seed Extract hydrates and prevents moisture loss, while Chia Seed Oil thickens and volumizes for a fuller look. Hair is left clean, bouncy and full of volume - so you can finally be fine, with being fine.. Ideal for fine hair. Cruelty-free. Free of Formaldehydes, Formaldehyde Releasing Agents, Phthalates, Mineral Oil, Retinyl Palmitate, Oxybenzone, Coal Tar, Hydroquinone, SLS, SLES, Triclocarban and Triclosan. 10 fl oz/ 300 ml. Thoroughly wet hair from roots to ends with lukewarm water. Lather a quarter size amount of shampoo in hands and work into roots and anywhere hair touches the scalp, then rinse. Rinse with cold water to close the hair cuticle and add shine. OUAR-WU87. FG-0126-A-00. Founded by hair stylist to the stars Jen Atkin, OUAI - pronounced way - originated HAIRGOALS. The mane addicts at OUAI believe that life is hard and looking good should be easy. That's why their line of luxury shampoos, conditioners, and styling products was designed to nourish hair and bring out its natural beauty - no glam squad necessary.