NIOXIN Diamax Advanced Treatment with HTX technology is your premium treatment for stronger, longer hair tomorrow. Instantly, visibly thickens hair so it's like having 11,000 more hair strands. Up to 8 hours visible fullness, even in heat and humidity. With daily use, protects existing hair roots and ends against damage and breakage allowing hair to grow longer. Application Tip: Spray onto scalp, massage, and work onto mid-lengths and ends.