Item #407107 AK4 Memory foam adjusts to you for complete, personalized support Pillow density: Firm Gusset shape for better support Ships to 48 contiguous states only Spot clean foam. Machine wash cover. Imported Find the best pillow for your sleeping style Memory Foam contours to your body for just-right support. Our Memory Foam Pillow reacts to your body's unique shape, weight and temperature to provide complete comfort. Memory Foam is an ideal material for a pillow: soft, supporting and â" important for allergy sufferers â" hypoallergenic. 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.