This Natural Cotton futon mattress is made with 8 layers of 100% unbleached Natural cotton, wrapped in virgin wool for a firm support. Virgin Wool is used as a natural flame retardant. All cotton mattresses will compact over time and require more frequent turning, flipping and rolling to ensure even wear. They are at their softest level new and will get progressively firmer over time. Classic old-school firm support of the original Japanese futon.