The 10,000+ athletes at the Tokyo Olympics will sleep on bed frames made of strong cardboard. According to the Athletes Village manager Takashi Kitajima, the frames can hold up to 200 kilograms (440 pounds).
"They are stronger than wooden beds," Kitajima said… "Of course, wood and cardboard would each break if you jumped on them."
From the Associated Press:
The single bed frames will be recycled into paper products after the games. The mattress components—the mattresses are not made of cardboard—will be recycled into plastic products.
The mattress is broken up into three distinct sections, and the firmness of each can be adjusted.