The most important thing to know about air-filled balloons is that they DO NOT FLOAT! When filled, gravity pulls them down to the ground. Air-filled balloons tend to last longer than helium-filled balloons, typically weeks or even months! However, latex balloons will get oxidized (cloudy) over time. Shine them up and they'll be good as new. Mylar (foil) balloons can be filled with air too and they'll always look great! Please call for more info.