Bean Bags as well as Fuf (foof) chairs make use of different sorts of filling up to fill them up. Many basic bean bag chairs are loaded with a white polystyrene foam pellet. This is one of the most common type of fill on the market. The next kind of filling up used is polyurethane foam. The polyurethane foam does not break down over time like the white pellets kind does. The polyurethane foam filled up chair like Fuf (Foof) or poof chairs are full of are incredibly soft as well as comfy. The chair mold and mildews to the form of your body. When you get up the chair slowly rises as it loads back up with air.