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A pillow protector is usually called a pillow protector or a zippered pillow cover. A version that fully seals the pillow may also be called a pillow encasement.
It is not the same as a pillowcase. A pillow protector goes directly over the pillow and under the pillowcase. Its job is to help keep sweat, skin oils, drool, makeup, pet hair, and everyday dirt away from the pillow itself.
Common Names for a Pillow Protector
Stores and product listings may use several names for the same basic item.
Pillow Protector
This is the most common name. A pillow protector is a removable fabric cover placed between the pillow and the pillowcase.
Many have a zipper. Others use an envelope-style flap. The zipper style gives fuller coverage because the pillow is less likely to slip out.
Zippered Pillow Cover
A zippered pillow cover is usually another name for a pillow protector. It closes around the pillow with a zipper instead of leaving one end open.
Check the product description carefully. Some sellers also use “pillow cover” for decorative cushion covers. Look for wording that says the cover is designed to go under a standard pillowcase.
Pillow Encasement
A pillow encasement fully surrounds and closes around the pillow. It normally has a zipper.
The word encasement means that the whole pillow is enclosed. These covers are often made with tightly woven fabric or a coated layer. Product features vary, so check the current listing instead of assuming every encasement provides the same level of protection.
Waterproof Pillow Protector
A waterproof pillow protector has a layer designed to stop liquid from reaching the pillow.
This can be useful for:
- Children’s beds
- Guest rooms
- People who sleep with wet hair
- Pillows used during meals or drinks in bed
- Homes with pets
- Travel and RV beds
Waterproof models may feel warmer or make more noise than plain fabric protectors. Some have a soft outer fabric with a thin waterproof backing to reduce the plastic-like feel.
Pillow Liner
“Pillow liner” is a less common term. It may refer to a thin inner cover placed around the pillow.
Be careful with this name because it can also describe the fabric shell that permanently holds a pillow’s filling. Read the product details to make sure the liner is removable and washable.
Pillow Slip
In some places, “pillow slip” means a pillowcase. It may not mean a protector at all.
A pillow slip usually has an open end and is used as the visible outer layer. It may be changed along with the sheets.
Is a Pillow Protector the Same as a Pillowcase?
No. A pillow protector and a pillowcase are two different layers.
The usual order is:
- Pillow
- Pillow protector
- Pillowcase
The protector stays close to the pillow. The pillowcase is the layer your face touches.
A pillowcase is washed often with the sheets. A protector may be washed less often, depending on how it is used and what the care label says.
Using both can make pillow care easier. The pillowcase handles daily contact, while the protector gives the pillow an extra washable barrier.
Is a Pillow Protector the Same as a Pillow Sham?
No. A pillow sham is mostly decorative.
A sham often has:
- A border around the edges
- An opening in the back
- Decorative stitching
- Fabric chosen to match a comforter or coverlet
A coverlet is a light bed covering that is usually thinner than a comforter.
Pillow shams are common on guest beds and styled bedrooms. They are not normally meant to replace a pillow protector.
You can use all three layers:
- Pillow protector
- Pillowcase
- Decorative sham
However, many people remove the sham before sleeping.
What Does a Pillow Protector Do?
A pillow protector helps keep the pillow cleaner by adding a washable layer.
It may help reduce contact with:
- Sweat
- Skin oils
- Drool
- Hair products
- Makeup
- Dust
- Pet hair
- Small spills
It can also help keep loose pillow filling contained if the pillow’s outer shell starts to wear. It will not repair a torn or badly damaged pillow, but it may slow down everyday staining.
A protector does not make a pillow last forever. Pillows can still flatten, clump, lose support, or develop odors over time.
Types of Pillow Protectors
The best type depends on how the pillow is used.
Basic Cotton Protector
A basic cotton protector is soft and breathable. It is a practical choice for most adult bedrooms and guest rooms.
Cotton absorbs moisture, so it may need regular washing. It is not automatically waterproof unless the product has a separate waterproof layer.
Polyester or Microfiber Protector
Polyester and microfiber protectors are often light and quick to dry.
Microfiber is made from very fine synthetic fibers. It can feel smooth and may hold less moisture than some thick cotton fabrics.
These protectors can be useful in dorm rooms, RVs, and homes where bedding needs to dry quickly. Some sleepers may find tightly woven synthetic fabric warmer than lightweight cotton.
Quilted Pillow Protector
A quilted protector has a padded surface.
It can add a little softness, but it may also change how the pillow feels. A firm pillow may feel slightly cushioned, while a thick pillow may become too full for its pillowcase.
A quilted protector can also take longer to dry.
Waterproof Protector
A waterproof protector has a liquid-resistant or waterproof backing.
It is helpful when spills, drool, or damp hair are common. However, the backing may reduce airflow.
Hot sleepers may prefer a thinner waterproof protector with a fabric top rather than a thick, heavily padded model.
Cooling or Moisture-Wicking Protector
Some protectors are sold as cooling or moisture-wicking.
Moisture-wicking means the fabric is designed to move moisture away from the surface. Results depend on the full material blend, the room temperature, the pillow, and the bedding layers.
Do not rely on the word “cooling” alone. Check the fabric, thickness, waterproof layer, and care instructions. A thick coated protector may still feel warm even when the outer fabric is described as cooling.
Full-Zip Encasement
A full-zip encasement completely surrounds the pillow.
It can be a useful choice for shared beds, guest rooms, dorm rooms, and stored spare pillows. Look for a zipper that closes smoothly and has covered edges so it does not rub against the sleeper.
Product construction varies. Check the current listing for material, closure design, and care instructions.
Which Name Should You Search For?
Use the term that matches the level of coverage you need.
Search for pillow protector when you want a basic washable layer.
Search for zippered pillow protector when you want the protector to stay securely in place.
Search for pillow encasement when you want a cover that fully surrounds the pillow.
Search for waterproof pillow protector when liquid protection is the main concern.
Avoid searching only for “pillow cover.” That term can bring up decorative covers for throw pillows rather than bedding protectors.
A pillow protector is usually called a pillow protector or a zippered pillow cover; the material, waterproof layer, fit, and construction make a big difference.
How to Choose the Right Pillow Protector
A protector should fit without crushing the pillow or leaving large folds.
Match the Pillow Size
Common pillow sizes include:
- Standard
- Queen
- King
- Body pillow
- Euro square
- Travel pillow
Check the pillow’s actual measurements. Labels are helpful, but pillows can vary in fullness.
A protector that is too small can compress the filling. This may make the pillow feel firmer or lower than expected.
A protector that is too large can wrinkle under the pillowcase.
Check the Pillow’s Loft
Loft means the height or thickness of a pillow.
A high-loft pillow needs more room inside the protector. Thick memory foam pillows, overfilled down-alternative pillows, and gusseted pillows may need a roomy protector.
A gusset is a fabric panel around the side of the pillow that gives it more depth.
Look at both the length and width measurements. Also check whether the listing mentions deep, high-loft, gusseted, or extra-full pillows.
Consider Heat
For hot sleepers, a thin cotton or lightweight woven protector may feel less warm than a thick quilted model.
Waterproof layers can reduce airflow. That does not mean they are always uncomfortable, but there is usually a tradeoff between liquid protection and breathability.
Cold sleepers may not mind a slightly thicker protector. Still, the protector should not make the pillow feel stiff.
Think About Noise
Some coated protectors may rustle when the sleeper moves.
This can matter in a quiet guest room, a shared bed, or a child’s room. Look for descriptions such as soft-backed, quiet, fabric-faced, or non-crinkly, but remember that these terms are not measured the same way by every maker.
Check the Closure
A zipper gives the most secure fit. Check whether the zipper is covered by fabric so it does not touch the face or catch on the pillowcase.
Envelope closures are simple and may feel softer, but they do not fully seal the pillow.
Open-ended protectors are easy to remove, though the pillow may shift inside them.
Do All Pillows Need Protectors?
Not every pillow must have one, but a protector is useful in many bedrooms.
A protector makes sense for:
- Pillows that are hard to wash
- Foam pillows that cannot go in a washer
- Guest room pillows
- Children’s pillows
- Dorm bedding
- RV bedding
- Decorative bed pillows
- Homes with shedding pets
- Pillows used with hair or skin products
Washable fiber-filled pillows may still benefit from a protector because washing the whole pillow can take longer than washing a cover.
Check the pillow maker’s instructions before washing the pillow itself. Foam, latex, feather, down, and fiber pillows may require different care.
Are Pillow Protectors Comfortable?
A well-fitted protector should not change the pillow very much.
A protector may feel less comfortable when it is:
- Too small
- Too thick
- Stiff
- Noisy
- Poorly fitted
- Bunched inside the pillowcase
- Made with a warm waterproof layer
The pillowcase also affects comfort. A smooth percale or sateen pillowcase can change how the full setup feels.
Percale is a crisp, simple weave that often feels light.
Sateen is a smoother weave that often feels softer and slightly warmer.
If a pillow feels too firm after adding a protector, check whether the cover is compressing it. A larger protector may solve the problem.
How Often Should You Wash a Pillow Protector?
Wash it often enough to keep it fresh, but always follow the care label.
A protector may need more frequent washing when:
- The sleeper sweats heavily
- Hair products are used at night
- A pet sleeps on the bed
- The pillow is used by guests
- The sleeper has been sick
- Food or drinks are used in bed
- The protector is visibly stained
Many people wash pillowcases more often than protectors because pillowcases touch the face directly. A protector can usually stay in place longer unless it becomes damp, dirty, or stained.
Do not assume every protector can handle hot water, bleach, ironing, or high dryer heat. Waterproof backing and zipper parts can be damaged by too much heat.
Check the care label before washing, drying, bleaching, ironing, or using stain treatments.
How to Wash a Pillow Protector
The exact method depends on the fabric and coating.
A simple routine is:
- Remove the pillowcase.
- Unzip or open the protector.
- Check the care label.
- Close the zipper before washing if the maker recommends it.
- Use the listed water temperature and cycle.
- Dry according to the label.
- Make sure the protector is fully dry before putting it back on the pillow.
Avoid stuffing too many protectors and sheets into one load. Crowding can stop them from washing and rinsing well.
Waterproof covers may need low heat or air drying. High heat can damage some backing materials.
Common Buying Mistakes
Buying a Pillowcase Instead
A pillowcase usually has one open end and is meant to be the outer layer.
Look for words such as protector, zippered, encasement, waterproof, or barrier cover.
Ignoring Pillow Thickness
A standard-size protector may still be too tight for a very full standard pillow.
Check measurements and depth details.
Choosing a Thick Protector for a Hot Room
A padded protector may feel cozy in a cold room but too warm in a small bedroom, dorm, or RV with limited airflow.
Assuming Waterproof Means Breathable
Some waterproof models feel light and flexible. Others feel warmer and stiffer.
The material layers matter more than the word “waterproof.”
Forgetting About the Washer and Dryer
Bulky quilted protectors take up more room than thin fabric protectors. Make sure your washer and dryer can handle the item safely.
Using the Wrong Dryer Heat
Too much heat can harm coatings, elastic, or zipper areas. Follow the care label.
A Simple Beginner-Friendly Choice
For most bedrooms, choose a lightweight zippered pillow protector that matches the pillow’s size and loft.
A basic cotton or cotton-blend model is a practical starting point. Choose a waterproof version when spills, dampness, drool, or pet accidents are a regular concern.
For guest rooms, consider protectors that are easy to wash and clearly labeled by size. This makes laundry day simpler when several beds use different pillows.
For children’s rooms, focus on washability and a secure closure. For dorms and RVs, quick-drying fabric can be helpful when laundry space is limited.
The best protector is not the one with the longest list of features. It is the one that fits the pillow, feels comfortable, and can be washed without turning laundry day into a small crisis.
Frequently Asked Questions
What is another name for a pillow protector?
A pillow protector may also be called a zippered pillow cover, pillow encasement, pillow liner, or protective pillow cover. The exact design can vary, so check whether it fully closes and whether it is waterproof.
What is the cover under a pillowcase called?
The cover under a pillowcase is usually called a pillow protector. It goes directly over the pillow and helps keep the pillow cleaner.
Is a pillow cover the same as a pillow protector?
Sometimes, but not always. “Pillow cover” can also mean a decorative cover for a throw pillow. Look for details such as a zipper, washable fabric, and sizing for standard, queen, or king bed pillows.
What is a pillow encasement?
A pillow encasement is a cover that fully surrounds the pillow and normally closes with a zipper. It offers more complete coverage than an open-ended pillow protector.
Do you put a pillowcase over a pillow protector?
Yes. Put the protector on the pillow first, then add the pillowcase. The pillowcase is the outer layer that touches your face.
Can a pillow protector change how a pillow feels?
Yes. A thick, tight, quilted, or waterproof protector may make a pillow feel firmer or warmer. Choose the correct size and a lightweight fabric when you want the pillow to keep its usual feel.
Should a pillow protector have a zipper?
A zipper is helpful because it keeps the protector securely around the pillow. Envelope-style and open-ended protectors are also available, but they provide less complete coverage.
How often should a pillow protector be replaced?
Replace it when the fabric is worn, the zipper no longer works, stains or odors remain after washing, or a waterproof layer begins to crack or peel. Follow the manufacturer’s current care and replacement guidance.
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