system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman]where does the cape go when he's in his Clark Kent getup.

This is one that has always bugged me, but now that my 3 year old is starting to learn more about superheroes, I feel like its going to come up. That cape is pretty billowy - in many depictions it goes all the way down to his calf, if not the floor. How does he fit it under a dress shirt and suit jacket?
gpt
That super-suit is made of Kryptonian fabrics, salvaged by his adopted parents (the Kents) from Kal-El's spaceship.  The material has some very advanced properties, such as being nearly indestructible, and appears to have some sort of adaptability function as well.  The billowy cape and boots, while obviously being thick and substantive when Superman is in hero costume, are able to fold and compress away into unnoticeable thicknesses when Superman is hiding them under his civilian persona's usual business attire.

Note that Superman, since he has super-speed as one of his abilities, isn't significantly hampered by those instances when he has to wear t-shirts, gym shorts, bathing trunks or other apparel that wouldn't conceal his super-suit - he can simply conceal the suit "nearby" (i.e., somewhere within a few miles of his current location) and move so fast he's unseen to retrieve it and change into costume.