It was hot and most of the crowd was 'in shirtsleeves'.
a man 'in his shirtsleeves'
a 'shirtsleeve' crowd
(..) Doctor? I'll see you. PERSON : "As I walk along the stony shore... of the pond in my shirtsleeves..." PERSON : "...Amazon basin in the north, once an island sea..." PERSON : "The highest truth on the subject remains unsaid... probably cannot be said. (..)1998 City of Angels