✨ Say Yes to Volume and Bounce! Salon-quality results without the salon price tag. Keep your color vibrant while pampering your strands. Join a movement that celebrates real beauty and authenticity. Transform fine hair into a voluminous masterpiece! Packed with biotin and keratin for strength and shine. Biotin & Chia Oil 300ml capacity Sulfate-free formula OUAI Fine Shampoo is a 300ml sulfate-free shampoo designed to enhance fine hair with nourishing ingredients like biotin, hydrolyzed keratin, and chia seed oil. It cleanses, adds volume, and reduces frizz, making it perfect for those seeking effortless, luxurious hair care.