Reflex foam is a great alternative to springs. Reflex foam is a high-density foam that is a common base for memory foam mattresses, similar to memory foam it supports you in your natural sleeping position. You can also buy reflex foam mattresses with fibre fillings for a similar feel to memory foam at a fraction of the cost. Reflex foam mattresses are quiet, easier to move, and repel dust mites, so are a brilliant choice for allergy sufferers.