Does not contain a thio ester compound. The new C³ formula (cysteamine, cysteine and cystine-containing polymer) causes a harmonious transformation. These active ingredients, based on amino-thiol and amino acid, have a very small molecular structure that allows easy penetration into the hair. Thanks to the low pH value and the innovative active technology, the hair is extremely protected during the perm process. The precise result is an exceptionally gentle and mild, yet powerful transformation, comparable to the so-called "acid perms". Silk protein gives the hair a soft and velvety touch. Adds shine and improves the durability of the perm. The result is a very balanced and durable transformation, evenly from root to tip - with plump curls. IngredientsAqua, Ammonium Thioglycolate, Cysteamine HCL, Ammonium Bicarbonate, Ethanolamine, Cysteine HCL, PPG-1-PEG-9 Lauryl Glycol Ether, Etidronic Acid, Polyquaternium-6, Sty. rene/PVP Copolymer, lauryl sulphate ethoxylate, perfume, amyl cinnamal, CI 47005, CI 42051