What it is: The Dyson Supersonic™ Gentle Air attachment to be used with the Dyson Supersonic™ hair dryer. Sold separately.What it does: Engineered to be kinder to fine hair and sensitive scalps, Dyson's Supersonic™ Gentle Air Attachment diffuses the air, creating a gentle cooler airflow while style drying hair fast. Compatible with all generations of Dyson Supersonic™ hair dryer 3.14" x 1.5" x 3.14" Imported