Celebrate your Earth Day themed party with these 11″ round Clouds printed latex balloons. The perfect balloons for your Earth Day party, these 11″ Sempertex party balloons are great for setting the scene! Package includes Clouds latex balloons. Mix these with a selection of our Earth Day foil mylar balloons for the perfect balloon bouquet clusters. The balloons can be inflated with helium to float or with a balloon air inflator to hang around the party area like a balloon arch garland. Balloons arrive uninflated.