Fortifying Fluid for weak, fragile hair, blended with microPROtec complex and Inter-Amino-Bond-Builder. Instantly transfers reinforcing soy protein deep into the hair and supports the bond-protein network. For long-lasting strength and stability of each individual strand. Targets weakened areas and reduces split ends by up to 99%. Take a hazelnut size amount and work through towel-dried or dry lengths and ends. Leave in. For maximum effect, leave-in overnight.