You might’ve heard of the term from a family member, friend or coworker - but do you know what it actually is? Blowout hair treatments have been around for decades, but the definition of a blowout has evolved with the rise of blow dry bars and varies depending upon the salon. In its simplest form, a blowout is the art of drying hair after a wash to achieve a smooth and sleek look, style and feel -- no curling or flat iron involved!