Mattresses are those wonderful things that we only replace every 10 to 15 years if were lucky. We’ll that’s at least how it used to be. or maybe even 20 or more plus years if your grandmother is anything like mine that has the ancient mattress in her guest room.
Most conventional mattress are made of polyurethane, petroleum based polyester and nylon, then treated to fire
They can also be wrapped in barrier cloths made from flame-resistant fibers, such as melamine and polyvinylidene chloride.