Moccasins
Type Moccasin into Google image search and you will see lots of comfy slippers. In the early 80’s they were little tan slip on shoes, worn by casuals. But start researching back further and you will see some smart but very casual shoes.

Gucci made very nice moccasins. Loake make some very nice moccasins. Their style is different again, the soft leather makes this a very comfortable shoe for casual occasions. The good ones don’t come cheap, but they exude class.

Below are some examples of 80’s style moccasins along with what I think are actually classic shoes.