Latex mattresses may get softer over time, although this typically occurs at a very slow rate. Latex mattresses are very durable and tend to last many years; most latex mattress companies will include a guarantee of at least 10 years and even a 15-year warranty. The amount of softness that develops over time is usually minimal, as latex makes up only the top few layers of the mattress and provides great support and resilience. Additionally, many people have an initial break-in period when they begin sleeping on their new latex mattress, as this takes some adjustment time due to its different feel compared to traditional innerspring mattresses.