My pillows have 20 years !!! LOLOLOLOL and I will keep them until they desintegrateI'll tell ya what's in your old favorite pillows: old dead dust mites, living dust mites, their poopies, and all the exfoliate from your faces and beards, and old saliva. Supposed to change your pillows once a year. I never met a pillow that went through the washer very well. Throw those things away!