h FatSak is filled with luscious foam (not beans), which has a special spring-recovery memory that enables it to return to its original shape. The upshot? FatSak won't lose its shape or drop its stellar comfort ranking. It'll remain high on the style stakes, too. Covered in your choice of sumptuous fabrics - from denims, to furs to suede cords - that are gorgeous to touch, removable and (mostly) machine washable, your FatSak is guaranteed to look good for longer.