This off-duty combo of an olive long sleeve shirt and a black crew-neck t-shirt is a tested option when you need to look casually dapper in a flash. Feeling venturesome? Spice things up by finishing off with black suede loafers. You're sure to always look good even despite the unbearable heat if you have this getup as a last-minute grab. An ensemble like this will help any man in his fifties upstage his younger pals.