Dyson Supersonic hair dryer review: Is it all just hot air?

A hair dryer is just a hairdryer isn’t it? Not when it’s a Dyson Supersonic hair dryer it’s not. Well, that’s the claim. Since its launch in 2016, Dyson has introduced a couple of extra haircare products, including the Corrale cordless straighteners, the brilliant Airwrap styler device and the Airstrait, which takes hair from wet to dry without the need for a separate hairdryer at all.