The Neptune mattress is an elite mattress like no other. With a Memory foam and Reflex Foam placed on top of the traditional springs, the comfort is just amazing. The luxurious fillings also help you to have a peaceful sleep. The springs are hourglass-shaped springs that get firmer in time to give you more support for your back. The renowned memory foam conforms to your body shape for ultimate stress-free comfort. This is a non-turnable mattress.