The Select Hybrid combines the best of both by combining the comfort & support of memory foam with traditional individually wrapped pocket springs that add support and reduce weight transfer for a more luxurious sleep experience. Individually wrapped pocket springs, cradle and fully support your body for ultimate comfort A layer of pressure-relieving memory foam, originally designed for NASA, cleverly molds to every contour of your body for ultimate support every night The 3-dimensional Ecocell® Foam core features elasticity to reduce painful pressure points as well as ensure efficient air circulation Airmesh sides allow for optimum breathability, enhancing constant air circulation throughout the mattress every night Firmness: Medium/Firm