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.
In many traditional innerspring mattresses from the 20th century and still some entry level models today have used the Bonnell spring to create durable and supportive mattresses.
Though this system is good at providing even support, there are complaints of aggravated pressure points and discomfort with Bonnel spring systems.
Pros: Durable materials and traditional even feel.
Cons: Pressure point discomfort and motion transfer issues.
Reflex foam is commonly found in the transitionary and base foam layer of foam mattresses. It is higher density than memory foam, but still has enough give to it where it isn't as hard as a solid surface.
Reflex foam, like memory foam, is a polyurethane foam blend, which has been adjusted for higher density during its manufacturing.
Although some very firm mattresses are made completely of reflex foams, most foam mattresses are a blend of memory foam on the top layer followed by reflex foams in the middle and bottom layers.
Pros: Firmer, supportive foam that enables enough contour for heavier sleepers and support to traditional memory foam mattresses.
Cons: Lower quality foams can offgas toxic chemicals and sag faster than alternatives.
Overall Score:
Bonnell Spring: 8.7/10
Reflex Foam: 8.6/10
Comfort:
Bonnell Spring: 8.7/10
Reflex Foam: 8.7/10
Softness:
Bonnell Spring: 8.4/10
Reflex Foam: 8/10
Cooling:
Bonnell Spring: 9.5/10
Reflex Foam: 8.1/10
Hypoallergenic:
Bonnell Spring: 9.5/10
Reflex Foam: 8.1/10
Odor:
Bonnell Spring: 9.5/10
Reflex Foam: 8.1/10
General Support:
Bonnell Spring: 8.9/10
Reflex Foam: 9.5/10
Eco-Conscious:
Bonnell Spring: 9.5/10
Reflex Foam: 8.1/10
Price Value:
Bonnell Spring: 8.4/10
Reflex Foam: 9.2/10