Air filled balloons can last for weeks, depending on the indoor environmental conditions.  Latex helium balloons are treated with hi-float to extend their lifespan and last generally up to 48 hours, however can’t be guaranteed as it depends on how they are stored (temperature and room conditions) and how much weight is hung from them.   Keep all your balloons away from heat, sharp objects, wood, brick, grass, etc.   We cannot be responsible for any balloons that pop or are let go after they have been safely delivered.   All balloons’ lifespan is significantly shorter outdoors, they will pop under direct heat and prolonged sun exposure.