Aloe Gel Memory Foam 13-inch King-size Pillow Top Mattress King Mattress measures 13 inches thick Originally designed for NASA, this space age foam cradles your body Materials: Aloe-infused gel memory foam First layer density: 0.5-inch, 4-pound GEL-infused memory foam, Second layer density: 2-inch, 3-pound high-resiliency Gel-infused memory foam, Third layer density: 3-inch, 3-pound green tea high-resiliency memory foam, Base layer density: 7.5-inch, high-density reflex base foam Mattress can be used with an existing frame. Bed frame not included