Repurposed cardboard, y'all.
See also: The prom dress a high school student made from cardboard and paper bags and her previous year’s prom dress made from soda pop tabs.
Additional proof that you can make clothes from, well, just about anything? Check out these items made from Golden books, book pages, computer wires, shirt collars, t-shirts, dry cleaner bags, a parachute, bicycle tire inner tubes, Starburst candy wrappers, plastic shower curtains, and a FEMA tarp. Whew!
(Cardboard dress photo via Strode College. I doubt that a wearer could sit down in this dress, but still, cool repurposing!)