So, bad news bears. If you're sleeping on a pillow every night, not just a guest bed, you should replace it every year. The amount of pure bacteria build up, oil build up, sheer skin cell shed...

buckwheat and latex pillows can last the longest.

In school, we were told to advise clients to replace pillows every two months - I disagree with this from a purely waste standpoint. But please don't try and buy a pillow for life!