How is the edge support on this mattress?

A perfect result, the firmest perimeter in the whole group at a 10.0 edge score. Loaded at the side, the bed sinks only about 2.5 inches, well under the field, because a foam-encased coil unit reinforces the perimeter and the extra-firm surface compounds the effect. The edge barely gives when you sit or sleep on it, so you get the full width of the bed as usable sleeping space and a rock-solid edge to perch on for dressing.

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