When was the last time you saw someone sporting a sports coat with shirt plus tie and sweater vest to class? Does that even exist anymore? Jon.
Actually, the most senior member of the faculty in my particular department wears pretty much just that - never seen the man without a sportscoat on - a real old guard Irishman. Of the other, only slightly less senior faculty members, one wears polos with jeans or sweatpants, and rocks socks with sandals on a regular basis, and the other only wears conference tees, relaxed fit jeans, and running shoes (not sneakers.) So, there you go.