Latex balloon suitable for air or helium filling.Filled with helium in a closed environment (18° C) float time is approximately 18 hours. Filled with air in a closed environment (18° C) endurance is approximately 20 days. When inflating latex balloons with air or helium we recommend inflating until the balloon has a tear drop shape. Be careful not to under-inflate (round in shape) or over-inflate (pear shaped) for maximum flying times. Latex balloons can be sealed by knotting, tying the balloon neck or using our one of our balloon closures. This balloon is photodegradable. * The dimensions shown may differ slightly.