We followed the directions - we allowed the bag to inflate for several days before using it - we fluffed it and turned it many times during this process but still have a saggy chair.  I am going to stuff the inner lining with more foam fill.  It is definitely convenient that there is an inner bag that holds the foam.  The inner bag does not have a zipper though so this would be aggravating if you don’t sew - you have to take out a seam to refill it and then sew it back.  We want to order a couple more bean bags for my kids playroom but will try another brand next time and hope for a fluffier chair.