PRODUCT SUMMARY: To transform frizzy, curly or frizzy hair with a professional result at home, Laura Sim's creates an authentic formula with natural extracts.An ancestral recipe for optimal results! Formaldehyde-free, Laura Sim's Brazilian Straightening Kit based on keratin and Brazil nuts repairs in depth. COMPOSITION: Paraben-free, formaldehyde-free, Laura Sim's Brazilian Keratin-based Straightening Kit repairs in depth. The Brazil nut, sacred queen of the Amazon rainforest, nourishes intensely thanks to its powerful softening and moisturizing properties. The hair is sheathed, strengthened. The hair is sublimated. The hair is smooth, silky, shiny. They are naturally tamed and remain soft to the touch.