This King Size Mattress Features: Independent pocket springs | eliminating surface disturbance. High-Density Foam | to provide a more supportive base and softer top. Comfortable Foam | for extra padding in top quilting to soften and relieve pressure through your hips, back and shoulders. Non-Woven Fabric | strong, breathable, with a soft touch. Knitted Fabric Cover | soft texture, moisture permeability and excellent flexibility to ensure breathability