The Chime 12" Hybrid Mattress provides you with a quality, value priced mattress. Supported with Individually Pocketed Coils, including two perimeter rows of sturdy pocketed coils for additional edge support, provide adaptable support that forms to each individuals shape. High Density Gel Memory Foam in the center third for additional Lumbar Support. A very good mattress for a guest room or price conscious shopper. This mattress ships compressed in a smaller box making it easy to transport.