This budget-friendly firm twin mattress offers a comfortable nights sleep at a comfortably affordable price. At the core of this mattress: 13.5-gauge tempered Bonnell steel coils that provide maximum support for a sound sleep. The mattress quality foam and quilted polyester fabric add an enhanced level of comfort. Comfort level: firm. High-quality Bonnell coils offer consistent support and proper balance. 1″ high-density support foam delivers edge-to-edge support. Knit quilt cover: polyester Poly-foam support.