Bonnell Spring Mattress
Bonnell spring mattress systems are the most traditional type of innerspring mattress. The Bonnell coil has an hour glass shape (wider at the bottom and the top than the middle) and are interconnected with a mesh of metal to make the spring system.
Some models today have used the Traditional Bonnell spring to create durable and supportive mattresses.
Pros: Durable materials and traditional even feel.
Cons: Pressure point discomfort and motion transfer issues.