What it is: A large round brush attachment compatible with all generations of Dyson Airwrap™ (sold separately).What it does: With a large, round head and long, fine bristles, the volumizing brush directs air deep into the strands of hair to deliver volume and body, creating tension to shape the hair as it dries. Attachments only; compatible with all generations of Dyson Airwrap™ styler 3.5" x 6.1" x 3.5" Imported