The criteria for runway models include certain height and weight requirements. During runway shows, models have to constantly change clothes and makeup. Models walk, turn, and stand in order to demonstrate a garment's key features. Models also go to interviews (called "go and sees") to present their portfolios. The more experience a model has, the more likely she/he is to be hired for a fashion show. A runway model can also work in other areas, such as department store fashion shows, and the most successful models sometimes create their own product lines or go into acting.