Models must look good and be their very best everyday on every runway show they’ve ever in. On casting for runway shows, they must look as as pretty as they could be to show the designers how much energy they could bring in to their respective clothes. Supermodels sometimes only get 5 hours of sleep and when there’s a major fashion shoot the next day, they must present themselves to the public looking perfect. Not getting enough sleep could make models stressful and their skin dull. You wouldn’t want a bad picture right, it would certainly end your career.