The luxurious St. James Firm "Hybrid" is a popular Williams Co. model, for its ability to relieve pressure while providing supportive spinal alignment. By utilizing a European layering technique and the highest quality raw materials, this mattress is a perfect fit for those who are looking to eliminate motion, heat, and pressure points. This mattress has a medium-firm, firmness level, and uses a support layer of individually wrapped coils, 3" of latex through the center as well as 1.5" of memory foam and 1.5" of high resiliency cold foam. With organic wool quilted into the cover to keep the body temperature regulated, the mattress is then wrapped in a soft and durable rayon from bamboo cover. The St. James plush is built to last, and is great for side, back, and stomach sleepers.