What is bean bag filling made of?

The beans in bean bag chairs could be one of many things. The most common type of bean is made of polystyrene, a thermoplastic material. These beans usually range in size from 3-9mm and keep their shape the longest. Bean bags could also be filled with styrofoam pellets, though this material is becoming increasingly less popular since styrofoam tends to flatten more quickly.

Since polystyrene is non-biodegradable, many eco-conscious bean bag suppliers will use recycled polystyrene particles.