.Astronaut Fancy Dress Costume Helmet for Adults | Fancy Dress Costume Helmets The yellow visor flips up to reveal your face (make sure you leave it closed when you're on a spacewalk!) and the molded plastic features fake tubes and colorful "buttons." Training to be an astronaut takes a lot of time and study, but dressing as an astronaut only requires an active imagination. If anyone needs us, we'll be orbiting Jupiter.