The King Koil Spine Support Ashton mattress collection delivers plush sleeping comfort and support at an exceptional value. Designed to provide a softer surface comfort with superior body conformity, the Ashton mattresses feature memory foam comfort layers and foam-encased LFK coils systems for superior comfort and edge support. The Ashton Mattress from Spine Support Collection by King Koil delivers plush sleeping comfort and support at an exceptional value. Designed to provide a softer surface comfort with superior body conformity, the Ashton mattresses feature memory foam comfort layers and foam-encased LFK coils systems for superior comfort and edge support.