Hybrid 1300 California King MattressWith this California king mattress, you have endless possibilities for restful sleep. Its power packed wrapped coils contour to your body. Layers of foamincluding response memory foamprovide support and comfort. You're sure to wake up feeling refreshed and restored. Comfort level: plush High density response memory foam; high density whisper foam 918 power packed 15 gauge wrapped coils Ashley Edge "steel encased"; 2 perimeter rows of 13 gauge wrapped