Sweetnight hybrid mattress offers both customized support and luxurious comfort. 14 inch mattress with a gel-infused memory foam layer conforms to body contours and regulates temperature. Individually pocketed coils provide support for proper spinal alignment and help to reduce motion transfer. The air-flow between coils provide the perfect of breathability. High-density foam provides reliable long-term support. This California King mattress cover is made of skin-friendly fabric that promotes airflow for a cool sleep. Sweetnight hybrid mattress also features a pillowtop for for adding a touch of luxury. Sweetnight medium firm California King mattress is not too firm and not too soft, which is at the perfect level of firmness.This California King size mattress in a box for smart shipping and easy setup. Sweetnight 14 inch mattresses come with a 10-year warranty to provide peace of mind for your purchase. Sweetnight Twilight collection of mattresses improve sleep quality to provide optimal deep sleep.