Ideal for... The medium barrel of the size 2 ghd ceramic brush round ceramic brush is versatile and creates a voluminous or soft blow-dry on medium to short length hair. This ceramic barrel brush retains heat to allow for faster blow-drying. How to use... Dry hair to 80% then working in small sections position the brush at the roots and direct the heat from the dryer towards the barrel. Keep the strand taut as you move the brush through the hair, continuing to direct the heat into the barrel.