No matter what companies say, pillows won’t last longer than 18 months if they aren’t protected by a pillow cover and have the ability to hold their shape and continue to provide optimal support.
The reason most pillows’ shapes and support are ruined is due to mould, sweat, fungus, and dust mites.
A memory foam pillow is built to deter mould, fungus, and dust mites and if you can find one that also has a pillow cover, you know it’s a pillow built to last.