Balloon Type: Latex Balloons and Foil. Size: 0.5 Mtr Float Time: Approx 4 - 5 days Cold air, hot air, high humidity, changing barometric pressure, high altitudes, and moving air from fans and vents will reduce balloon float times. The float times posted on our site are the maximum to be expected. Changing conditions mean that on some occasions balloons may float for only one day and on other occasions the same balloons may float for many days. We guarantee that your balloons will be delivered in perfect condition, but float times will vary. There are no guarantees for float time if balloons are displayed outdoors WARNING: ADULT SUPERVISION REQUIRED: Children under 8 years can choke or suffocate on uninflated or broken balloons. Keep uninflated balloons from children and discard broken balloons at once.