A pillow protector costs a fraction of a pillow and determines how long the pillow lasts, and most households do not use one.
A pillowcase is a single layer of fabric that is changed weekly. It does not stop moisture, oils and skin cells reaching the fill.
A protector sits between the two and takes all of that. It washes; the pillow largely does not need to.
That alone extends a pillow’s usable life substantially, which is why it is the highest-return purchase in a bedroom.
Where a pillow is designed to be washed whole, of the kind at nuzzle-pillows.com, a protector still reduces how often that is necessary, which is easier than a wash-and-dry cycle every month.
Worth being specific. Dust mites feed on shed skin cells and thrive in warm humid environments, which describes a bed.
They are a common allergen, and pillows and mattresses are where they concentrate.
Zipped encasements with a fine enough weave to exclude them, on both the pillow and the mattress, are a standard recommendation for allergy management, alongside washing bedding regularly at a temperature that deals with mites.
Anyone managing a diagnosed allergy should follow their doctor’s advice rather than general guidance.
Some protectors crackle, feel plastic or trap heat, which is why people remove them.
That is a property of cheap waterproof versions rather than of protectors generally. A breathable fabric protector is undetectable under a pillowcase.
For anyone who sleeps hot, this is where to spend rather than on the pillowcase.
Along with the bedding rather than as a separate job, which is what makes it happen.
Follow the label on anything waterproof, since heat damages membranes.
An encasement with the zip partly open is not an encasement.
Protectors wear out, and a torn one no longer does its job.
Including guest pillows, which are frequently the oldest.