The Natural Innerspring Futon Mattress offers the comfortable, familiar feel of a traditional innerspring mattress, making it an excellent choice for a sofa bed or guest futon. Its 4-inch core of double-tempered steel innersprings is surrounded by two layers of eco-friendly high-resilience foam, providing added cushioning and support. Multiple layers of blended cotton enhance comfort, while the flippable design ensures even wear and extended durability. Medium-Firm Comfort: Ideal for side sleepers and those seeking pressure relief. 8-Inch Profile: A balanced thickness for comfort and flexibility. Durable Innerspring Core: Built with 353 four-inch steel coils, made from long-lasting recycled steel. Eco-Friendly Soy-Based Foam: A fire-retardant-free alternative to conventional foams, partially derived from soy. Blended Cotton Layers: Provides added breathability and softness. Flippable Design: Identical top and bottom layers allow for even wear and longevity. Versatile Use: Perfect for occasional-use futon frames, guest beds, and convertible futon sofas. Mattress Cross Section (8 Inch) 1" Cotton 1" High Resilience Soy Foam 4" Bonnell Coils 1" High Resilience Soy Foam 1" Cotton