The Oleander collection is an innerspring extra firm mattress
•Edge Support: M-Steel Wire
•Foam: 25KGS High Density Polyurethan Quilting Foam
•Handles:Fabric Sewn Handles
•Innerspring: Traditional Bonell Innerspring Extra Firm Coils 13 Gage Unit
•Coil Counts: Twin: 345 / Full: 483 / Queen: 576 / Cal King: 748 / E.King: 736
•Comfort: Extra Firm
•Warranty: 10 Year Non-Prorated Warranty
•Foundation: DM250