This 9-inch thick futon mattress offers exceptional comfort and support, perfect for chair ottomans or futon frames measuring 21x28 inches. Constructed with six 2-inch layers of high resiliency convoluted foam, this mattress provides a plush and relaxing surface. The custom-blended cotton batting enhances both resilience and long-lasting durability, ensuring years of comfortable use.\n\nDesigned for easy conversion, this mattress effortlessly folds to fit standard futon mechanisms, making it a versatile seating and sleeping solution. Its adaptable design allows for use in various living spaces, providing a comfortable and convenient option for guests or everyday relaxation. Enjoy the convenience of a comfortable seating or sleeping surface without sacrificing space or style.\n\nThis replacement mattress is a simple and effective way to revitalize your existing futon or chair ottoman. The black cover offers a neutral aesthetic that complements a wide range of decor styles. Experience the difference a quality mattress can make, transforming your furniture into a cozy and inviting retreat.