A hard hat hair dryer has a rigid, helmet-like hood that lowers with an adjustable arm over the upper part of the head of a seated individual. Blowing air flows over the entire head at once to dry hair quickly and evenly.
Most hard hat dryers plug into an electrical outlet and offer various heat and speed settings. Typically, the hood is large enough to fit over a head with rollers. This style of dryer resembles some salon hair dryers. However, many of the dryers designed for home use are portable, so they fold and have built-in carrying handles for easy transport.