z.one concept™ USA is the exclusive representative of milk_shake brand in North America. Our products are color-safe, feature natural and organic ingredients, and are not tested on animals. PHILOSOPHY The philosophy behind every milk_shake hair care and color product is to bring hair back to its natural state. From care and styling to bleach and hair color, our products go further to treat and condition hair. Our secret? The right combination of natural ingredients and the latest innovations in hair care and hair color technology.