Olaplex, N ° .3 Hair Perfector®, 1,7 fl oz (50 ml)

Use before shampooing; NOT a conditioner, it's a bond builder. 

Use 1x per week, for damaged hair 2-3x per week. Apply on damp towel-dried hair. Apply a generous amount from scalp to ends until hair is thoroughly saturated. Leave on for 10 minutes. Longer if desired. Rinse from hair, for best results, shampoo with OLAPLEX Nº4 and condition with OLAPLEX Nº5.