Cal King 10 Inch Thick Soft Sleeper 5.5 Mattress With 4" Visco Elastic Memory Foam USA Made Shipped in one large box ready to use. USA Made! One 6" Layer of Soft Sleeper Superior Support Foam Glued to a 4" layer of Soft Sleeper 5.5 Visco Elastic Memory Foam This luxurious material reacts to your body temperature reducing pressure points. 100 NIGHT SLEEP TRIAL! 10 Year Soft Sleeper Manufacturer Limited Warranty!