Will this mattress hold up over time?

It earns a Very Good 8.2/10 for durability. The upper layers use high-density foam that holds its loft instead of crushing flat, over 1000 thick 13.75-gauge tempered-steel coils that resist the slow sag thinner wire develops. Built flat in Ontario rather than vacuum-rolled, the foams never endure weeks of compression. Rotating it head-to-foot every few months keeps wear even through the 10-year warranty period.