Can’t decide between gel or mousse? Why choose when you can have both with L’Oréal Professionnel Tecni.Art Transformer Gel. This first-of-its-kind product starts as a hair gel, but the consistency quickly changes to a foam formula once emulsified in your hands. When used as a gel, the product adds control to short cuts and definition to curls without stiffness. When used as a mousse, the product adds volume and lift to hair from root to tip.