Its formula contains Vitamin B5 to nourish and moisture hair.Good for nourishing & smoothing damaged hair and prevents hair dryness.Leave-on formula nourishes and repairs hair. Usage: After shampooing,massage an appropriate amout of Nourishing Treament Replenishing Mask through wet hair.Leave for 1 minute and then rinse throughly.For best results,use other products of the B5 series. Storage:Store in a cool,dry place away from direct sunlight.