Delivering unsurpassed support and comfort time-after-time, the Sealy Iguaza Falls plush Euro-top mattress gives you the relaxing sleep you deserve every night. quilt layer: FlameGuard fiber; 2x SealyCushion ultra-soft foam comfort layers: 1 SealyCushion extra-soft foam; 1 SealyCushion extra-soft foam; SealyCool gel foam center 1/3 innerspring system: Sealy Embrace coils, SolidEdge HD System durable knit fabric cover twin mattress: 74x38x12H; 434 coil count twin xl mattress: 79x38x12H; 448 coil count full mattress: 74x53x12H; 589 coil count queen & split-queen mattress: 79x60x12H; 704 coil count cal. king mattress: 83x72x12H; 884 coil count made in America Includes mattress only. Mattress plus box spring option also available. You can purchase this mattress without a box spring, but your best value is to buy the set together. The matching box spring is specially designed to provide support, absorb shock and reduce wear to the mattress. You'll sleep more comfortably, and your new mattress will last longer.