Your ones @twinkledag are great.
I think it's a bit ugh seeing the rubber ones worn with socks, as seems so fashionable right now. You'll see armies of tough-looking teenagers loitering, and the whole lot of them will be attired like that! It's only a matter of time before one slider has "I love" written on it, and the other says "my socks". I wonder if their sliders would stay on if they needed to run away quickly, or if they'd all have Cinderella moments?
Mind you, my own summer footwear of choice is usually trainers without socks, or Red or Dead shoes (also sockless) which I know some find equally disturbing...