95% Polyester/ 5% Spandex One size fits kids(4'3 -5'1 ), Easy fit by belly Drawstring closure & elastic tightening on ankles Updated Powerful Fan - Fully inflates the costume in 30s, Battery/Power Bank Charging, can last over 30000 hrs Easy to carry. Easy set up. Easy to walk, jump, sit, run,dance. Great fun. Include: Costume, Fan, Battery box and detailed user manual. (Requires 4 AA batteries or Power Bank, not included)