Wake up refreshed and supported every morning with a single firm bonnell spring mattress for back support, designed to deliver dependable orthopaedic comfort and posture support. Featuring a robust 12.5g Bonnell spring system, this 3ft firm comfort bonnell spring mattress with posture support combines a quilted 100% polyester panel top for a smooth cushioned surface and recycled polyester layers for breathable insulation. Medium to firm in feel, it's perfect for back or stomach sleepers seeking reliable support and is hypoallergenic to help keep allergens at bay. Rolled and boxed for easy delivery, this firm bonnell spring mattress single size is a practical choice for everyday comfort.