The Brooklyn Signature is expertly designed with breathable materials, patented cooling technology and up to 1024 individually encased coils for a superior sleep experience Available in three comfort levels to fit your individual sleep style. (A medium firmness may be for you if you are a combination back, stomach and side sleeper; prefer a balance between contouring support; prefer the feeling of sleeping above your bed's top layers; or are a couple that needs to strike a balance with your comfort preferences Certi-Pur US certified and meets the highest standards for quality Compressed and rolled into a 19" x 19" x 45" box so your mattress can be shipped by parcel directly to your door Fits most bed frames including box springs, slats, platforms and adjustable foundations