Balmain hair expressions are perfect for volume, color, and extension services with seamless integration into natural hair. The individual strands are secured with pre-bonded keratin bonds, allowing for a more customized and natural look. The innovative flat flexible tip of the extensions ensures optimal hair distribution, comfortable wear, and easy application. A pack of hair expression extensions contains 25 pieces. For fine hair, 75-100 pieces are recommended. For extension services, 150 to 200 filling extensions are required.