REACTION B-3 TREATMENT The safest and most effective system for straightening false false 7.43 FL OZ For virgin, healthy hair types Reaction B-3 Treatment is a supplementary hair care treatment made with natural extracts to internally and externally nourish the hair with vital nutrients and proteins. It seeps deep into the hair immediately to volumize, condition, protect, and shine. It's the perfect after-care treatment following i-Straight (Permanent Straightening System). ***