No turn mattress. Foam encased - high density foam edge material strengthens the seating edge and increases the overall sleeping surface. the eco memory foam provides cooling comfort while reducing pressure points and tossing and turning. The 5200 Pocket spring is manufactured in Ireland and provides a luxurious sleeping experience, these springs hug and support every unique contour of your body. It also features 2 layers of the exclusive posturfil HD2000 Pocket spring unit.