"The Shark FlexStyle TM Curl-Defining Diffuser attaches to the Shark FlexStyle TM hair dryer for fast, even drying from root to tip. To enable curl-perfection, our diffuser features retractable and extendable prongs. Retract prongs for shorter, finer hair and less heat on the scalp. Extend prongs for longer, thicker hair and for reaching and lifting at the root. FAST STYLING: Fast, even drying from root to tip with deep bowl for styling larger sections cutting down on drying and styling time. PETAL DESIGN: Creates a more natural hold on curls to maintain volume while you're styling. EXTENDED PRONGS: Recommended mode for longer, thicker hair that reaches and lifts the root. RETRACTED PRONGS: Recommended mode for shorter, finer hair for ultimate coverage and less heat on the scalp. BEST FOR: Wavy, curly, and coily hair. NO HEAT DAMAGE: Fast Drying with no heat damage. COMPATIBILITY: Compatible only with Shark FlexStyle Air Styling & Drying Systems (HD400's Series). WHAT'S INCLUDED: Shark FlexStyle Curl-Defining Diffuser Attachment.