ghd Duet Blowdry 2-in-1 Hair Dryer Brush Brand New w/out box. Includes heat resistant case and bristle cleaning brush. *All Offers Considered* Enjoy long-lasting results up to 24 hours and up to 50 percent more humidity resistance. This brush includes a storage bag that unzips to a heat mat and a brush to clean bristles. It’s energy efficient and offers conversation-friendly sound levels. Clinical Results: *No thermal hair damage detected after 100 cycles of four passes on thoroughly towel-dried hair.