This California king mattress and box spring combine the benefits of gel memory foam with traditional innerspring coils for truly restorative sleep. Backed by a 25-year warranty (15 years non-prorated, 10 years pro-rated). 6" foam core foam edge support 2¾" Cool Action gem memory foam plus 1" Cool Reaction slow recovery latex 1" comfort foam 2" KoolComfort memory foam polyester knit cover StabLBase double-beam frame This mattress set includes a mattress and box spring. The box spring is specially engineered to work with the mattress to provide durable support and long-lasting comfort. The box spring measures 9½ "H. Mattress set measures 21"H when stacked. Your mattress is created exclusively for you only after you order it, then delivered directly to you. California king mattress measures 72x84x11½"H.