One of the arguments behind Starfire's barely-there outfit is that her powers are fed by solar energy. Since Superman also gets his powers from our yellow sun, cartoonist J.Bone designed a new, less UV-blocking costume for the Man of Steel.
J.Bone, who has worked on the Batman: The Brave and the Bold and Super Friends comics, jokingly gives Superman a rather beachy look, one that requires us to look in a rather inconvenient spot to see the Kryptonian's shield.
J.Bone also decided to pair it with a cape:
It's a cute joke on Starfire's outfit, although it does come off as weirdly sexy as Chris Haley's Superman with a Power Girl-inspired ab and pecs window.