Kal-El got the suit this time around from holo-Jor-El. But it's always been Kryptonian tech. I have no problem with it being some ultra-advanced, molecular sandwich, reinforced smart fabric, the outermost layer of which is tessellated into an interwoven pattern to retain flexibility and keep the weight down. Remember, Krypton was thousands of years ahead of us. Kinda like the Asgardians in Marvel...
--Jonah
--Jonah