Pillows made with natural materials are quite resilient and long-lasting. However, environmental factors can impact the longevity of your pillow. Pillows may absorb body oils, sweat, saliva, and more which can cause degradation of the fabric and fill over time. This can be mitigated with good quality pillow protectors and periodic dry cleaning, however, despite best efforts, pillows will need to be replaced every 5-10 years as they yellow and wear.