A Spa Sensations 10" Memory Foam and Spring Hybrid Mattress provides the best of both worlds - the comfort of a memory foam top layer with the support of a traditional spring coil base layer. This technology offers luxury and durability for restful . restorative sleep. Coil springs on the Spa Sensations 10" Memory Foam and Spring Hybrid Mattress adult provide better motion separation for an undisturbed rest.