Our best-value down pillow provides the quality, support and comfort you need at a great price. 500 fill power down guarantees loftiness. Percale ticking. Let's talk timelines. Synthetic stuffings have an average lifespan of four years. If you have allergies, your pillow should be replaced every two years. And high-quality down can last ten to fifteen years with regular washing and fluffing. No matter what the fill in your pillow, if the form is lumpy and uneven or you're experiencing back and neck pain, it's time for a replacement..