Apparently it takes more than just Chios.
Jacinto asks: What do Chio sleep on?
Basically, anything comfortable they can get their hands on. Chios tend to scavenge the remains of human settlements and will bring back any type of cloth they can get, which is repurposed into tents, clothing, bedding, and other supplies. They’ll also gather any kind of softer plant material they can find, like tall grasses, and use them as a base for their sleeping area.