comments:
Bobbob34 posted on r/nostupidquestions4d
I don't. I use pillow covers and wash those. Like this, not pillowcases, those go on top of these. Same as a mattress protector. They zip closed. - https://www.amazon.com/AllerEase-Breathable-Zippered-Pillow-Protector/dp/B07J9SGRY3