Express Ion Round Brush® S, M, L and XL available Helps minimise flyaways and creates a sleek, frizz-free finish. Aluminum barrel heats up during blow-drying to help shape your style. Speeds up drying time. Express Ion Complex™ moulded into the bristles and barrel helps hair dry faster and controls frizz. Uniquely shaped corkscrew bristles provide a smoother finish.