The supporting layer of this mattress is built with 800 mini 9-Zone Pocket Spring. The comfort layer can be choosed from Gel-infused Latex/Memory, Latex, NASA Memory Foam, Silk, or combination of Latex+Silk or Memory Foam + Silk. The mattress is also covered with eco-friendly Bamboo-infused Fabric which makes your sleep 50% more breathable than most of other mattresses selling on the market. Lastly, for the excellent quality, we offer 25 Year Warranty for all our mattresses. (9-Zone Pocket Spring provides the best contour support to any shape of the sleeping body).