Drift off with confidence on a supportive sleep surface crafted for comfort and posture, as the firm bonnell spring king mattress for back support sleepers trust delivers orthopaedic reliability night after night. Featuring a robust 12.5g open coil Bonnell spring system, this king size mattress offers dependable support for joints and muscles, while the quilted 100% polyester panel top ensures a cushioned yet durable feel. Breathable recycled polyester layers inside encourage airflow and sustainability, making it a practical and eco-conscious choice. With a medium to firm feel, it's perfect for back or stomach sleepers who want extra support, and its rolled, boxed design means you'll have no trouble getting it into your bedroom.