The Regis DESIGNLINE Leave-In Protein Boost is designed to vastly improve the health of your hair. This hair protein booster is made of botanical proteins that nourish, strengthen, and protect hair from damaging environmental factors. This hair treatment product restores the natural protein bonds in your hair. This process helps to increase your hairs strength, elasticity, and manageability. Treat your hair the same way that the professionals do, and go with DESIGNLINE.