Expect a great night of sleep on the Stewart & Hamilton Premier X-Firm mattress set. The quilt layer of every Stewart & Hamilton mattress features Safe Slumber Fire Retardant System and 3/4'' thick Gel Flex Memory Foam with silky soft Stretch Knit Fabric. The Stewart & Hamilton Premier X-Firm mattress set combines the best of comfort and value. This 14'' thick mattress has Duraspring Individually Wrapped Coils with Steel Encasement.