Paul Mitchell 407 Styling Brush Paul Mitchell 407 Styling Brush Say hello to Paul Mitchell's most versatile styling brush yet... The Paul Mitchell 407 Styling Brush is necesity for every haircare routine - it can be used for blow-drying, shaping and smoothing the hair. What is it? The Paul Mitchell 407 Styling Brush is a multi-purpose styling brush that works on both wet and dry hair to smooth, blow-dry, and shape curls before diffusing. How does it work? The rounded shape of this brush, as well as the nylon bristles, provide gentle grip without tugging.