When he found the drug on the vacuum bag, he killed Teresa. The material is covered with release film, bleeder/breather material and a vacuum bag. Sometimes a vacuum bag is used to compress a wet layup. Empacher uses a vacuum bag technique to bond the outer layers with the honeycomb core. Vacuum bag material is available in a tube shape or a sheet of material. Vacuum bag processing is suited to components with thin sections and large sandwich structures. The bear removes the vacuum bag and dumps it outside where it opens automatically somehow. Yet others will back-fill the vacuum bag with inert gas, typically nitrogen, at zero pressure.