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.
Visco elastic foam is another term for memory foam. It is a blend of polyurethane foam that was developed for airplane cushions by a NASA contract in the 1970s.
The difference between visco elastic foam and other types of polyurethane foam is its slow response and low resistance. Its soft surface allows for contouring and its slow response lowers bounce.
Visco elastic foam, like all polyurethane foam, is made from a blend of substances and has a tendency to off-gas. Those with lung sensitivities should do additional research about the quality of foam to ensure that it won't aggravate them.
Pros: Contouring comfort, competitive pricepoints, and widespread options.
Cons: Sagging and off-gassing problems with lower quality foams.
Overall Score:
Bonnell Spring: 8.7/10
Visco Elastic Foam: 9.3/10
Comfort:
Bonnell Spring: 8.7/10
Visco Elastic Foam: 9.4/10
Softness:
Bonnell Spring: 8.4/10
Visco Elastic Foam: 9.5/10
Cooling:
Bonnell Spring: 9.5/10
Visco Elastic Foam: 8/10
Hypoallergenic:
Bonnell Spring: 9.5/10
Visco Elastic Foam: 8/10
Odor:
Bonnell Spring: 9.5/10
Visco Elastic Foam: 8/10
General Support:
Bonnell Spring: 9.5/10
Visco Elastic Foam: 8/10
Eco-Conscious:
Bonnell Spring: 9.5/10
Visco Elastic Foam: 8/10
Price Value:
Bonnell Spring: 8.4/10
Visco Elastic Foam: 9.4/10
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