Enjoy rejuvenating sleep with the Isaac sleep 12 in. Hybrid Mattress. Isaac sleep Mattress features individually wrapped pocket coils that isolate motion between sleeping partners. Responsive to the needs of the side, back and stomach sleeping styles. Isaac sleep's 9.8 in tall coils come padded underneath two layers of foam for maximum comfort. Complete with a high quality knitted fabric pillow top surface, Isaac sleep relieves pressure on hips, back and shoulders, while delivering a smooth and even feel night after night. Isaac sleep mattress is a high quality memory foam + firm innerspring mattress that avoids the sag and sink of foam and air mattresses and ships compressed and rolled into a box for easy delivery.