An attachment including an air inlet for receiving airflow from a hair styling apparatus, at least one air outlet, a chamber for conveying air from the air inlet to said at least one air outlet, wherein the air inlet is located at one end of the chamber, and the at least one air outlet extends along the length of the chamber and the cross-sectional area of the chamber decreases in size from the air inlet along the length of the at least one air outlet.

An attachment including an air inlet for receiving airflow from a hair styling apparatus, at least one air outlet, a chamber for conveying air from the air inlet to said at least one air outlet, wherein the air inlet is located at one end of the chamber, and the at least one air outlet extends along the length of the chamber and the cross-sectional area of the chamber decreases in size from the air inlet along the length of the at least one air outlet.

An attachment includes a casing having an air inlet for receiving airflow from a hair styling apparatus, a hair engaging member supported by the casing, an airflow outlet between the casing and the hair engaging member and shaped to direct air over an external surface of the hair engaging member and airflow guiding means extending over the external surface of the hair engaging member.

An attachment includes a casing having an air inlet for receiving airflow from a hair styling apparatus, a hair engaging member supported by the casing, an airflow outlet between the casing and the hair engaging member and shaped to direct air over an external surface of the hair engaging member and airflow guiding means extending over the external surface of the hair engaging member.

An attachment including a casing having an air inlet for receiving an airflow from a hair styling apparatus, a hair engaging member, supported by the casing, and adapted to move relative to the casing between a first position and a second position under the action of an over-centre mechanism. First and second airflow outlets are formed between the casing and the hair engaging member when the hair engaging member is in the first and second position, respectively.

An attachment including a casing having an air inlet for receiving an airflow from a hair styling apparatus, a hair engaging member, supported by the casing, and adapted to move relative to the casing between a first position and a second position under the action of an over-centre mechanism. First and second airflow outlets are formed between the casing and the hair engaging member when the hair engaging member is in the first and second position, respectively.

System and methods for treating and shaping a keratin fiber are provided. A light-based system includes an activation system configured with one or more light source. The light source is configured to apply electromagnetic radiation at a target region including the keratin fiber. The light-based system applies the electromagnetic radiation to the target region to effectuate photocrosslinking with the assistance of a photosensitizer on the keratin fiber and transition the keratin fiber from a first physical state to a second physical state.

A hair care appliance including a body, and a handle having a first end in fluid communication with the body and a second end comprising a primary fluid inlet into the appliance wherein the primary fluid inlet includes a first aperture extending at least partially around the handle and a second aperture extending through the second end of the handle. The handle can include an end wall that is substantially orthogonal to the handle at the second end with the second aperture extending through the end wall. The first aperture may be adjacent the second end. The handle may include a fan unit for drawing fluid into the primary fluid inlet upstream of the primary fluid inlet. The first aperture may include a plurality of apertures extending at least partially around and along the handle. The second aperture may include a plurality of apertures extending through the handle end.

A hair care appliance including a body, and a handle having a first end in fluid communication with the body and a second end comprising a primary fluid inlet into the appliance wherein the primary fluid inlet includes a first aperture extending at least partially around the handle and a second aperture extending through the second end of the handle. The handle can include an end wall that is substantially orthogonal to the handle at the second end with the second aperture extending through the end wall. The first aperture may be adjacent the second end. The handle may include a fan unit for drawing fluid into the primary fluid inlet upstream of the primary fluid inlet. The first aperture may include a plurality of apertures extending at least partially around and along the handle. The second aperture may include a plurality of apertures extending through the handle end.

A hair care appliance including, a body, a heater, a PCB and a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet out of the body wherein the PCB and heater are in fluid communication with the primary fluid flow path and the PCB is upstream of the heater. A fan unit may be provided and the fan unit is upstream of the heater and may be upstream or downstream of the PCB. A thermal barrier may be provided between the PCB and the heater. The thermal barrier may be in thermal communication with the PCB and functions as a heat sink for the PCB.