ɔːlðˈoʊ ðə pˈoːɹʃən əvə kˈeɪv wɪðˌɪn ðɪs pˈɜːmɐfɹˌɔst zˈoʊn wɪl biː bᵻlˌoʊ fɹˈiːzɪŋ, pˈɜːmɐfɹˌɔst dʒˈɛnɚɹəli dʌznˌɑːt ɐlˈaʊ wˈɔːɾɚ pˌɜːkəlˈeɪʃən, sˌoʊ ˈaɪs fɔːɹmˈeɪʃənz ɑːɹ ˈɔfən lˈɪmɪɾᵻd tə kɹˈɪstəlz fɹʌm vˈeɪpɚ, ænd dˈiːpɚ kˈeɪv pˈæsɪdʒᵻz mˈeɪ biː ˈæɹɪd ænd kəmplˈiːtli ˈaɪsfɹˈiː.
Although the portion of a cave within this permafrost zone will be below freezing, permafrost generally does not allow water percolation, so ice formations are often limited to crystals from vapor, and deeper cave passages may be arid and completely ice-free.