The filling consists of flame retardant EPS-'beans'. These little beans absorb the warmth of your body and produce a pleasant and warm sensation.Needless to say that the beans we use are top notch. They are of 'virgin quality'. In other words: the best you can get! As the bean-bag are more uniform and stronger than the 'regular quality', your beans will stay in shape for a long time.From time to time you have to fluff up your bean-bag to revive its comfort. How? Roll it until it reaches its original shape.