The SUS Crewmate Killer Costume comes in vibrant colors and is very lightweight and odor-free. Comfortable and easy to wear with good range of motion. The blower fan that inflates the costume is always working to keep you cool. There is elastic at the ankles and the arm sockets to seal in the air for proper inflation. The blower/fan inside the costume requires 4 AA batteries (not included).Child size fits heights from 4'5 to 5'0.