Powered by the Sun!
Fill the UFO Solar Balloon with air, attach the line, and watch it magically ascend high into the sky!  No need to use your lungs to fill this thing.  Simply run with it while holding one end open, then tie it closed once it is about 90% full of air.  The sun will heat up the balloon in seconds, and off it goes!  This product works best when there is very little to no wind.  Untethered balloon will reach incredible heights!  Inflated balloon measures 10' long x 2' dia.  Optional string measures 60' long.

This balloon gains buoyancy because the air inside the balloon has been heated by radiation from the sun.  The black balloon material absorbs the heat of the sun's rays, causing the air inside the balloon to expand and reduce in density compared to the air outside of the balloon, giving it buoyancy.  This balloon functions just like a hot air balloon, with the sun acting as the primary heat source.