Wella FusionPlex Amino Refiller is a rinse off treatment that penetrates down to the cortex, refilling it with amino acids. Discover the new FUSIONPLEX care collection. For up to 95% more resilience against breakage, designed to repair and protect the hair against breakage and damage. Formula is fortified with the silksteel fusion program, inspired by spider silk, one of the strongest fibers in nature. It penetrates deep down the cortex and instantly recovers hair fiber and helps to prevent future hair breakage. Even the most damaged hair feels renewed, smooth, elastic and resilient against breakage.