Why worry when you can chime? With the Sierra Sleep Chime innerspring king mattress, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High density foam provides the firmness you love. Gel memory foam provides restorative support for your lower back. Hypoallergenic material is ideal for sufferers of allergies for ultimate undisturbed sleep–not to mention peace of mind. Plus, this mattress arrives in a box for quick and easy setup. Simply bring it to your room, remove the plastic wrap, and unroll. You’ll be amazed at how it fully expands within minutes. Foundation/box spring available, sold separately. Fabric: Body: Polyester (100 %) Care Instructions: Product Care| Mattresses:|Rest easy with the fact that your Ashley-Sleep mattress doesn’t require much care and maintenance. For starters all Ashley-Sleep mattresses are designed to be no flip—now isn’t that a relief. | How to care for your mattress: To help keep your Ashley-Sleep mattress clean a thin mattress protector is recommended so it breathes to allow airflow and heat dissipation. Ashley-Sleep does not recommend you use a quilted mattress pad as it will change the feel of the mattress you selected at the store. It may also trap heat that needs to escape. Don’t use dry cleaning fluid of any type on your mattress. These chemicals could damage some of the comfort and upholstery materials. Vacuuming is the only recommended cleaning method. If you must clean a stain use mild soap with cold water and apply lightly allowing the mattress time to fully air dry. Please remind the kids not to jump on their Ashley-Sleep mattress as doing so can break down the inner construction and materials.