The leave-in cocktails are activated by heat and treat the three main problems caused by colour treatment. Carb Cocktail bonds a 3-D, carbohydrate-based "fibre network" to the hair surface and instantly "fattens" fine, limp strands. This breakthrough cocktail replenishes lost protein and adds body to hair by surrounding each strand with an invisible, flexible microfibre 'mesh' made from a carbon-based complex (cellulose, starch and oat bran). It's not a styling gel or root lift: it's a bionic tonic that makes hair look much thicker and fuller.