The Newberry 12-inch is a gel memory foam and innerspring mattress that combines the best of two leading sleep technologies at incredible value. The pocketed coil base gives the mattress unprecdented orthopedic support and eliminates motion transfer while progressive layers of memory foam provide comfort and optimal spinal alignment. The quilted pillowtop cover gives the mattress a soft padded surface. This mattress ships compressed, so the box will be able to fit through narrow hallways and staircases. <br /> <br /> <ul> <li>Size: Twin</li> <li>Set includes: Mattress</li> <li>Construction: First layer: .5-inch of gel infused memory foam, Second Layer: .25-inch comfort foam, Third layer: 25-inch comfort foam, Fourth layer: .5-inch comfort foam, Fifth layer: .75-inch of comfort foam, Sixth layer: 8 inches of 768 Count - 13 Gage Wrapped Coils.</li> <li>Support: Firm support</li> <li>Materials: Stretch knit quilted pillowtop cover, gel memory foam, comfort foam, 13 gage wrapped coils</li> <li>12-inch profile hybrid memory foam and innerspring mattress</li> <li>Pocketed coil base prevents motion transfer between partners</li> <li>Mattress ships compressed for ease of delivery and set up</li> </ul> <br /> <br /> <b>Dimensions:</b> <br /> <ul> <li>Mattress dimensions: 12 inches high x 39 inches wide x 75 inches long</li> </ul> <br /> <b>Mattress Tips:</b> <br /> <ul> <li>Remove from packaging within 72 hours of receipt to maximize expansion.</li> <li>This product arrives very tightly packed. Unwrap and allow 48 hours for this product to return to its original shape.</li> <li>Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours.</li> <li>Due to machine-cutting manufacturing processes, there may be slight variances in the dimensions of this product.</li> </ul> <br /> <i>Please be advised that even similar products may produce different firmness results.</i> <br /> <br /> <b>Once opened this product is not returnable</b> <br />