Awasome Full Hair Ideas. “if you are looking to add volume to your hair, start with a volumizing shampoo as the foundation,” says austgen. Leave it on for 15 minutes.

Leave it on for 15 minutes. Wash it out with warm water and a mild shampoo. “volumizing shampoos are going to help fatten and swell the hair cuticle to create a more airy feel and look of the hair.”