The product content ensures that the hair remains straight and smooth for an average of 4-6 months, moisturizes the hair, gives extra softness and vitality to the hair, prevents frizz and frizz, is ideal for curly and wavy hair. Usage: Apply the product as if applying dye to dry and clean hair washed with salt-free shampoo, wait 45 minutes. - Dry the hair completely with a blow dryer. After the blow dry, press it with a straightener at a maximum of 230 degrees. After the press, wait for 15 minutes and wash the hair with salt-free shampoo and dry it. It is 100% original. Returns of opened products are not accepted.