A salon-level blowout, whether it's done at home or by a professional, starts with the right tools – and that doesn't just mean a high-quality blow dryer. The right brush can be the difference between a great blowout and a mediocre one. But the best brushes to blow dry hair aren't all alike. The right choice for you will depend on your hair type, your blowout goal, and your level of expertise.
In general, a round brush is the most classic shape for blowouts. It's what you will see most professionals using because it allows greater control and can create any shape or style one might desire. If you're not as experienced at blow-drying, or have super thick or wavy hair, a paddle-shaped brush might be a better choice, since they're a little easier to control. Size is another factor to consider when choosing a blow dry brush. Smaller brushes are better for shorter hair or tighter curls, while a larger brush can create mega volume on any length hair.
Lastly, take a look at what your brush's barrel and bristles are made of before you purchase. Ceramic brushes hold heat really well, vented barrels speed up drying time, and nylon or boar bristle mixtures are gentle and give shiny end results.