Redken 5th Avenue NYC Color Extend Conditioner Color-Treated Hair 8.5 Oz [New]. Redken Color Extend Conditioner For Color-Treated Hair 8.5 Fl Oz Redken Color Extend Conditioner For Color-Treated Hair 8.5 Fl Oz Helps protect, soothe and lock color intensity Keeps color-treated hair smooth, manageable and shiny Smoothens cuticle surface