Have been using this product for over 15 years! Not a blonde, but when I'm at the beach, I always have a bottle with me. Eliminates snarls when brushing after swimming, and then protects my hair throughout the day. Also smells great, and doesn't frizz so my naturally curly hair continues to look styled between swims. You do not need to use much, so I've had a bottle last for a few years. Worth every cent!