CET's iPS Freezing Medium Kit contains iPS Freeze Medium A and IPS Freeze Medium B, which are required for proper cryopreservation of iPS cells. CET's iPS Freeze Mediums provide a safe environment for cells during, freezing, storage, and thawing processes. This kit is designed to preserve cells in low temperature environments. Improper freezing and thawing of iPS cells will lead to a marked loss in cell viability and potential loss of cell lines. Media is shipped on gel packs.