The Elchim Cocoon Diffuser for EL3900 hair dryers is designed to gently dry curly or wavy hair while preserving its natural shape. It distributes heat evenly to help reduce frizz and maintain curl definition. Ideal for gentle drying, it helps create soft, defined and voluminous curls. Distributes heat evenly for gentle drying Helps preserve natural curl shape Enhances volume and curl definition HOW TO USE Attach the diffuser to the compatible hair dryer. Place sections of hair into the diffuser and dry using moderate heat while lifting toward the roots to maintain curl definition.