The Silentnight 4000 Pocket Geltex Ultra Mattress features all you need for an energising and dreamy rest. Designed with a box top layer attached to the top of the mattress to offer ultimate cosy cushioning. Effortlessly easing your body into a state of bliss. Sitting at the heart of this mattress are 2000 Mirapocket springs and 2000 mini springs. This spring system identifies and targets the areas of your body that need the most support. Ensuring any built up aches around your spine, shoulders and neck are elevated. Completing the hybrid mix is a layer of Geltex. Acting similarly to foam, this layer cuddles you in comfort for cloud-like indulgence. Geltex is inherently cooling, perfect for hot sleepers. Available now at Mattress Online.