The relyon pocket memory ultima mattress features pocketed springs that shape perfectly to your body contours due to each spring having its own independent action the mattress also has a 50mm layer of memory foam the visco elastic memory foam responds to your body temperature conforming perfectly to your body contours to provide perfect support helping to reduce stress and relieve aches and pains the mattress features cool comfort a unique highly permeable fibre woven into the mattress fabr