Abstract: Apparatus and process for blow drying hair in which the air is dehumidified by passing it through a special housing fitted with a moisture-absorbing filter insert placed ahead of the air which impinges against the hair. A regeneratable drying agent such as aluminum oxide, silica gel, or the like constitutes the moisutre absorbing filter insert. In a preferred embodiment a fan driven by an electric motor sucks the drying air through a slit in a double-walled hood which fits over the hair so that the air sucked through the slit must pass through the filter insert into an inside wall portion of the hood which is perforated and lies next to the hair which is being dried. A holder for the hood is swivelably mounted so that it can be fixed to a wall. Moist air which reaches the outside hood is recirculated to the inside wall and again fed to the filter insert for repeated dehumidification. In this manner at least part, if not all, of the air is dehumidified.