Expanded polytetrafluoroethylene (ePTFE) based films made of polyester (PES), a semipermeable membrane, and expanded polytetrafluoroethylene (ePTFE) layers for use by industrial composters for the purpose of sealing and insulating; Semi-permeable layered masking films made of two layer PES (polyester) and a functional expanded polytetrafluoroethylene (ePTFE) layer for the purpose of sealing and insulating