Which type of styling product is commonly referred to as mousse?

Mousse is commonly referred to as a foam styling product because of its lightweight, aerated texture that resembles whipped cream. This formulation is designed to provide volume and hold without weighing the hair down. When applied, it expands upon contact with hair, allowing for better distribution and creating body and movement in hairstyles. Mousse is particularly effective for adding volume to fine hair and can also enhance curls and waves by defining them without making them stiff or crunchy.

The other options represent different types of styling products that have distinct characteristics and uses. Gel is typically thicker and provides strong hold, often creating a wet look. Creams are emollient products that add moisture and can help to smooth or define textures, while sprays usually deliver a fine mist that sets hairstyles in place, providing a different level of hold and finish. Each product serves a unique purpose in hairstyling, but mousse specifically stands out as a foam product, which is integral to its primary function of adding volume and texture.