Diamond Shine 24-Hour Firm Hold Hair Spray is a long-lasting, color-safe hair spray that luminously locks in your style for 24 hours. why is it different? Diamond Shine 24-Hour Firm Hold Hair Spray provides 24-hour hold and shine, even on the most humid days. Its formula contains keratin and panthenol to strengthen & enhance shine while UV and thermal protectants work to keep hair color vibrant. It is safe for color-treated hair. who is it for? Diamond Shine 24-Hour Firm Hold Hair Spray is ideal for all hair types.