The Secret of Botanicals: Mallow! Native to Europe, Mallow is traditionally recognized for its scalp-softening properties. Boost the volume of your fine hair thanks to the Yves Rocher Volumizing Shampoo which is enriched with Organic Mallow known for its coating action power. Yves Rocher Laboratories have selected organically grown Mallow flowers for their hair-smoothing qualities. It contains more than 98% natural ingredients and has a botanical cleansing base.