The Beautyrest Black L-Class Exta Firm mattress is designed for those sleepers who need more support than the average sleeper while relieving pressure points. Sleep cool as a cucumber with our BlackIce™ 4.0 technology. The luxury pressure point reliefe system cradles your body and provides comfort throughout the night. Triple support, provided by the T3 Pocketed Coil® technology system, weaving 3 steel strands wound into one coil to absorb energy, reduce motion transfer, and provide longlasting support for uninterrupted sleep. Mattress depth: 13.75″