The 12-inch profile Mercer Hybrid Gel Memory Foam Innerspring Mattress combines the support of a wrapped steel coil innersprings with the conforming response of gel memory foam. Starting with a .5″ top layer of gel infused memory foam that disperses body heat and creates a cooler sleeping surface while retaining the pressure-relieving properties of traditional memory foam. A second layer of .25î comfort foam and a third layer of .25î comfort foam and a fourth later of .5î comfort foam works with the support layer providing you with the ultimate sleeping experience. An additional layer of .75î of comfort foam works with the 8î support layer of individually wrapped coils, which are in their encased in separate pockets so they can contour precisely to your body. Individually wrapped coil innersprings move independently and reduce the sensation of movement on a bed providing contouring comfort and support for an undisturbed night sleep. Covered with a beautifully detailed quilted pillow-top knit cover with a corded edge and coordinating knit sides for breathability. This mattress ships compressed, so the box ships fast and will be able to fit through narrow hallways and staircases.