Hair Spray is exactly what it says on the box. It's a spray and is designed to mimic the look you get after a quick dip. It works on your hair as naturally dehydrates and absorbs natural oils from the hair. This makes it easy to create natural, structured, and wavy looks with the spray. Hair spray is primarily used as a pre-styling and most hair sprays should be applied to damp hair before drying. This will generally get the most out of a hair spray as it allows you to create more volume and texture in the hair, which is the primary purpose of a hair spray.