Hot Air Balloon Twist – Butterfly Swarm – by In The Breeze. Butterfly Swarm animated and kinetic Hot Air Balloons are made with quality weather resistant polyester. The Balloon measures 16″ x 12″ with a 26″ Curlie tail. 6 different alternating colorful printed panels are supported with fiberglass rods which help maintain their shape. Plastic backs the fabric, making the panels rigid. Heavy duty swivels attach the spinner tail and is used to hang your Balloon. Balloons ship flat and they are easy to assemble.