"This is a superior fill 9"" deep (approx) quilted hybrid spring mattress with a layer of memory foam from Wilson Beds. Built around the traditional double insulated 13.5 gauge open coil spring unit, it has a layer of polyester comfort fillings, a layer of visco-elastic memory foam, and is topped with a deep quilted Cooltouch sleeping surface for an additional layer of comfort. A single sided soft feel mattress that should be rotated regularly for best results. Compressed, vacuum packed, rolled and boxed for easy handling and delivery and therefore it does not come with side supports."