ɪn dᵻskɹˈaɪbɪŋ hˈɛdɡɪɹ, dʒˈuːlɪəs ɛksplˈeɪnz ðˌæɾə hˈæt ʃˌʊdəv vˌɛntɪlˈeɪʃən tə pɚmˈɪt ðə fɹˈiː flˈoʊ ʌv ˈɛɹ baɪ kənvˈɛkʃən.
In describing headgear, Julius explains that a hat should have ventilation to permit the free flow of air by convection.