Mattresses, including plush ones, generally have a lifespan of seven to 10 years. However, mattress longevity is determined by mattress type rather than firmness level. Here’s a quick overview of roughly how long each type of mattress lasts: –Innerspring: 5-8 years –Foam: 8-10 years –Latex: 10-12 years –Hybrid: 8-10 years The lifespan of a plush mattress will also depend on how well you take care of it. For example, rotating your mattress every few months can help keep it in top-notch condition.