Bonnel Spring Mattresses
have wire coils as the support structure. This mattress has a strong border wire attached to the perimeter of the coils. The border wire supports the coils, helping to retain shape and reduce sagging. The edge is enforced with specially shaped springs or foam to support the sleep surface right to the edge, to help prevent `rollout’ and edge breakdown. The upholstery is separated from the spring system by an insulator, a tough padding, wire or netting layer that prevents the upholstery from sinking into the coils. Covered with a high quality imported quilted fabric cover.