Metal 32%, Polyester 20%, Plastic 48% Never worry about repumping air into tires with Zero-Flat Tire technology in the jogger's all-terrain bicycle tires Jog with ease with the LED light safety feature included on the jogger's parent tray Lockable front swivel wheel for ease of maneuverability Lightweight steel frame offers effortless mobility Convenient parent tray includes two cup holders and covered compartment storage