ULTIMATE SMOOTH HAIR SERUM 1.0OZ. Benefits: Nourishes hair in 30 secs, with smoothness that lasts up to 3 days*. Deeply nourishes hair inside & out leaving it visibly smoother & shinier. *If unwashed for 3 days vs. untreated. Features: Heat protectant for dry & frizzy hair. Notes of jasmine, vanilla, bergamot, peach & sandalwood - enjoy a floral bouquet scent with every use. For best results, use with ULTIMATE SMOOTH Shampoo, ULTIMATE SMOOTH Conditioner, and Hair Mask (weekly). *vs. untreated. Key Ingredients: *Wella Company is a member in International Collaboration on Cosmetics Safety.