The Olaplex No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner set is a professional hair care product recommended for all hair types. Made with biotin as an active ingredient, this cruelty-free shampoo and conditioner set from Olaplex is designed to maintain and strengthen hair bonds, providing a healthy and nourishing hair care experience. With a period after opening of 12 months, this product is perfect for anyone looking to achieve salon-quality results at home. Made in the United States, this set is suitable for both men and women.