Find the right bed for a good nights sleep with our grey miracoil memory bed featuring the wonderful miracoil zoned spring system the mattress offers fantastic body support throughout the night zone technology offers a range of firmness within the mattress with a softer zone for your upper body a firmer area for your hips and lower back and a soft zone for your knees and feet its clever design helps to keep your posture aligned the edge to edge support helps prevent outward side dipping