Pantene’s research has uncovered that normal-thick hair fibers intersect more often than fine hair and have a tendency to rub up against each other. This friction can cause chipping of the cuticle and a rough, dry feeling. Normal-thick hair also has up to twice the amount of protein than fine hair, making it less flexible. Pantene’s unique shampoo and conditioner system contains Anti-Breakage Complex, which moisturizes and reinforces normal-thick hair from root to tip. Hair is revitalized and left strong against future damage.