The Sealy Baby Posturepedic Crib Mattres is designed with patented innerspring coils used in Sealy's adult mattresses. These coils ensure that the mattress will hold its shape providing proper head and back support for as long as you use it. The non-allergenic sleeping surface is incredibly soft for extra comfort and features a triple laminate fabric that provides an antibacterial and anti-static surface to protect against tears wetness mold and mildew.