We use only the highest quality latex balloons available. We also use Hi-Float in all bouquets for delivery. Hi-Float is non toxic and cleans up with water should a balloon explode. Latex balloons filled with helium, on average, can last around 12-24 hours depending om many factors. Some people do have latex allergies so please order with care. Most hospitals and some business do not allow latex balloons because of alergies. Please keep this in mind when ordering.