Among the Stars The world astronaut means "star sailor", and in the Adventurous Astronaut costume will make you feel like you can sail through light years of stars. As outlandish as it sounds, the motto of many astronauts is to "stay humble". So, when you're defying gravity this Halloween, remember to still say thank you when you get candy! Why You'll Love It Made from 100% polyester for a comfortable fit. Resists wrinkles and shrinking. Hand wash cold, hang dry. Do not iron or bleach. Follow the size chart for a cosmic fit.