Will a deep plush mattress hold up over time?

Yes, durability scores 8.7 out of 10 with a 10-year warranty. The give you feel is in high-density gel foam designed to resist body impressions, sitting on a 1,200-coil core of thick 13.75-gauge tempered steel that does not wear out. Using a mattress protector and rotating it head-to-foot regularly helps the deep comfort layer wear evenly across the years.