The classic silk therapy formula that you have come to love is now available in a lighter formula. Silk therapy lite is an ultra-light leave in reconstructing treatment formulated to give fine and thin hair a miraculously smooth and silky appearance without weighing down the hair or adding excess oil. Strengthening elements of silk give hair strength, resilience and vitality leaving hair manageable and protected. BIOSILK is the original silk infused line of hair care products using natural pure silk in every product silk contains 17 of the 19 amino acids in hair and is the strongest fiber in the world equal to steel.