Leather, enclosed-ish toe, not too much of a "flatform" tractor-tyre sole.
I saw a woman wearing a par of yellow, almost patent like, leather sandals last year, and regret I did not stop & ask her where they came from.
John Lewis do standard black leather ones, but I'm also in the market for something quirky - I have quite a selection of Campers & John Fluevogs, but most of the Fluevogs have fairly high heels, and post-lockdown, too much heel just doesn't do it for me (and I think my feet have expanded from an EU 40 to a 41 or even 42 if the shoes run narrow).
Any inspiration? I'll be working in the US and Australia over the summer, so wanting something nice but practical.