How long does a memory foam pillow last?

Verified-purchase reviewers across the candidates report two to five years of usable life before the foam softens or clumps, with solid Tempur-Pedic blocks lasting the longest (some Reddit users in r/BuyItForLife report 15+ year ownership) and budget shredded pillows breaking down soonest. Replacing or topping up the fill on adjustable pillows extends life further.