Wake up relieved with Mellbreak Ortho Plus Mattress by Sealy! It's an extra firm feel that is perfect if you are prone to back problems or aches and pains. The very foundation of this mattress has been expertly engineered the PostureTech Core Support spring system provides soothingly deep support throughout your whole body. This mattress also incorporates EdgeGuard technology, sitting along the edge of the spring system allowing for a sturdy, durable mattress edge. To top it off, this mattress is designed with PowerPack comfort fillings. This unique design offers extra lumbar support, so you can sleep without any compromise. 5 Year Guarantee. Free Next Day Delivery.