A luxurious open coil mattress with a strong 12.5 gauge orthopaedic spring unit and steel rod frame.The Memory Paedic is a cheaper alternative to Latex and contains a dual layer of the visco elastic layered across layers of hypoallergenic fillings to aid an alergy free sleep. Memory foam was developed by Nasa originally to relieve pressure for astronaughts but it was found it had a much more commercial use in the bed industry and since then has promoted healthy sleep patterns worldwide.The coolknit fabric cover provides body temperature regulation and will keep you warm in the colder months and cooler in sumer. An all round star buy at a low price that doesnt reflect the sheer quality in this product.