Since oil typically causes hair to lie flat and listless on top of the head, it makes sense that mousse intended to give your locks a little boost would be alcohol laden. This is because the alcohol pulls oils from the hair, which makes each strand lighter. It also coats each strand of hair and then expands. When you coat your whole head in volumizing mousse, this causes all your hair strands to expand and push against one another - hence, volume is formed.

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Since volumizing mousse contains alcohol, it's so important for girls with dry hair or curls to stay away from this type of mousse. For the rest of you out there, apply to damp hair, then blow dry and style, and you have instant volume!

Budget Friendly Volumizing Mousse: TRESemmé Thermal Creations Mousse

This mousse volumizes hair while you heat style. It has polymers that melt in the proximity of heat. This helps make your hair easier to work with and style when blow drying. This mousse will add volume very quickly. Per TRESemme's website, the best way to use Thermal Creations Mousse is to apply 2 to 3 drops, run the mousse all the way through your hair, then blow dry upside down with a round brush. $4.99, but prices can vary by location.