Head Jog 96 Brush Heat Wave are radial brushes with ceramic ionic coated barrel featuring the Heat Wave technology, that helps reduce any unnecessary damage whilst heat styling. Whilst blow-drying over 60°c, the red strip on the barrel will change to fluorescent yellow; this is to warn you that you may be applying too much heat to the hair. Available in 5 sizes: Head Jog 93 (18mm), Head Jog 94 (25mm), Head Jog 95 (34mm), Head Jog 96 (44mm), & Head Jog 97 (52mm).