Mane N Tail Hair Strengthener Daily Leave-In Conditioning Hair Treatment, Daily Leave-In Conditioning Treatment for chemically and heat damaged hair. Hair Strengthener is an advanced daily use protective formula that increases and maintains hair strength. Provides essential protection from excessive heat and chemical styling to help reduce split ends. Hair strengthener rejuvenates hairs natural elasticity and strength with proven results for healthier, stronger and longer hair. Provides additional moisturizing and conditioning protection.