Living Review durability forecast
What should age first?
Modeled, not observed. Assumptions: nightly use by one or two adults, the Westin box spring as the foundation, occasional rotation, and no liquid damage. Inputs are the layer depths from the independent teardown and Westin’s coil description; foam densities are not published, and denser foams would slow the trajectory below. This is directional material reasoning — not a failure probability, a service-life guarantee, or a review score.
Earlier signal
A tufted 2.25-inch pillow top over 2.5 inches of memory foam is where softening shows first on this kind of build, typically as a body impression under the hips rather than a coil failure. Because the surface starts at 5/10, a modest loss of loft is felt sooner than it would be on a firmer bed, and side sleepers over 250 lb load that layer hardest.
Design countermeasures
An 8-inch pocketed-coil unit Westin describes as reinforced, a foam perimeter rail, and a construction the company says is built for hotel-grade use. Marriott’s FAQ states its products are tested to withstand increased usage; that is the manufacturer’s claim, and no independent long-term result exists to confirm it on the 2024 build.
Confidence limit and update rule
Low confidence: one lab test, no foam densities, and owner data only for the previous construction. This section will be revised when a construction change is published, when a second compatible test or long-term retest appears, or when meaningful owner evidence on the 2024 build accumulates. Until then, treat the 10-year warranty and its unpublished indentation threshold as the practical floor.