what does a diffuser do

A diffuser is an attachment for a hair dryer that disperses the air to reduce frizz and keep from disrupting the natural wave pattern of curly hair. It is a round, plastic attachment that can be slid onto the nozzle of a hair dryer. Diffusers work by spreading the airstream over a wider area in a more controlled way, allowing curls to dry without being disrupted the way they would be with a normal dryer. The diffuser dries curly hair beautifully or adds volume to flat hair by dispersing air through many small air holes over a larger area. Diffusers are the perfect hair accessory for those with curly to wavy hair types as they can help to keep the natural curl pattern. Without a diffuser, curls can easily be blown out.