fabric.
That’s why even someone who regularly changes their pillowcase can eventually discover a yellow pillow underneath.
What About Memory Foam?
This is where you need to be particularly careful.
A solid memory-foam pillow should generally not be thrown into a washing machine unless the manufacturer specifically says that it is washable.
Instead, remove the cover and follow the manufacturer’s cleaning instructions. Spot-cleaning the affected area is often the safer approach.
The same basic rule applies to any pillow with special materials:
Don’t assume that because one pillow can be
