What It Is So Silver All-In-One Toning Leave-In Spray is a buildable color depositing formula to neutralize unwanted yellow undertones in between salon visits and prepare hair for styling. What It Does Enriched with conditioning agents and neutralizing dyes to deliver 10 beautifying benefits: 1. Tones/neutralizes yellow undertones 2. Adds moisture 3. Boosts shine 4. Detangles 5. Controls frizz and fly-aways 6. Improves the appearance of split ends 7. Prevents breakage from brushing 8. Smoothes cuticles 9. Helps with hair manageability 10. Prepares hair for styling.