Your new balloons can be filled with either helium (not included) or standard air and are suitable for any birthday theme.High quality durable foil balloons in this set can be reuse several times and easy to assemble, so they can be used for future birthdays to come.Suspensible foil balloons could be hanged in any place, like garden, indoor and swimming pools.Don't put the balloons near to the flame, sharp objects or lemon juice, they might burst. Don't fill too much air into the balloons, 80%-90% is enough.