The STL 8000 collection features 2090 9" wrapped coils giving you the proper support you need while reducing pressure to your body. Extra lumbar support is added with gel infused memory foam. 5 zone specialty foam allows for additional cooling action while supporting the body all night long. Foam encasement gives you the strong edge needed for sleeping, sitting on the side of the mattress. All Kingsdown products go through a diagnostic test (I.C.S.A) to ensure your mattress feels like the sample in the store. This remarkable mattress offers a 10 year non pro-rated warranty.