The thermal conductivity of argon is 68% of that of air or nitrox, hence its use in drysuit inflation.
ðə θˈɜːməl kɑːndəktˈɪvᵻɾi ʌv ˈɑːɹɡɑːn ɪz sˈɪksti ˈeɪt pɚsˈɛnt ʌv ðæt ʌv ˈɛɹ ɔːɹ nˈaɪtɹoʊks, hˈɛns ɪts jˈuːs ɪn dɹˈaɪsuːt ɪnflˈeɪʃən.