43mm Diameter Brush: The go-to size for building body and smoothing.Magnesium Barrel: Save time on your blowdry with our magnesium barrel that retains and releases heat into the hair.60% Boar, 40% Nylon Bristles: The best of both worlds – naturally condition hair while providing ultimate control.Anti-Bacterial: This brush stays cleaner for longer with its magnesium barrel design.