Helium is a natural, non-flammable, non-toxic, odorless gas. It is lighter than air and is safe for the environment. Helium is an asphyxiant and inhaling it can result in loss of consciousness, due to lack of oxygen – it should never be inhaled.
We only use 100% pure helium gas, that is specifically made for balloons. We do NOT use any flammable mix-ins like hydrogen to reduce our costs, as that would be irresponsible and dangerous.