Olaplex No. 4 Bond Maintenance Shampoo One of Kenyon's favourites for ridding the hair of chlorine is the Olaplex No. 4 Bond Maintenance Shampoo ($14-$28), which "uses the brand's proprietary technology to relink the bonds in the hair for stronger, healthier hair." Image Source: nordstrom.com Olaplex No. 4 Bond Maintenance Shampoo $14 from nordstrom.com Buy Now