Our corals are individually bagged using heat sealed bags, No rubber bands or metal clips here. They are then at least double bagged, some have multiple bags depending on how sharp the coral is. We then place all the corals in another bag and place it inside an insulated box. We then place in an ice pack or heat pack if needed. We don't put air in the coral bags. There is no need for air in the coral bags and it only raises shipping costs. We have been shipping this way for years now and have over a 99% success rate.