Do You Need a Mattress Protector?

Short answer: yes, for most people. A good mattress protector doesn't change how your bed feels — but it protects a significant investment from stains, moisture, allergens, and wear that can void your warranty and shorten your mattress's life.

Here's what you need to know to decide if you need one, and what kind to get.

02What a Mattress Protector Actually Does

A mattress protector is a thin cover that fits over your mattress like a fitted sheet. It sits between the mattress and your bed sheets, creating a barrier against:

• Liquid spills and sweat — moisture is the #1 enemy of mattress longevity
• Stains — sweat, body oils, drinks, and other spills permanently discolor foam and fabric
• Dust mites and allergens — mattresses accumulate allergens over time; a protector limits buildup
• Dead skin cells, pet dander, and debris — normal daily accumulation that seeps into mattress layers
• Bacteria and mold — moisture trapped in foam creates ideal conditions for growth

A protector doesn't significantly change how a mattress feels. Most quality protectors are thin enough to be barely noticeable.

03Mattress Protector vs. Mattress Pad vs. Topper: What's the Difference?

If your goal is protection, get a protector. If your mattress is too firm, get a topper. If you want a slight softness boost with some protection, a mattress pad can do both — but it won't protect as thoroughly as a dedicated protector.

04Who Really Needs a Mattress Protector

You should seriously consider one if you:

• Have allergies or asthma (dust mites live in mattresses; a protector reduces exposure)
• Sweat during sleep — moisture in foam and latex degrades the material over time
• Have kids or pets who get in bed
• Eat or drink in bed occasionally
• Want to keep your mattress warranty valid (more on this below)
• Own a premium mattress — the more you spent, the more sense it makes to protect it

You might be fine without one if you:

• Sleep on a budget mattress you plan to replace in a few years anyway
• Already have a mattress pad with some water resistance built in
• Live in a very dry climate and don't have allergies or pets

Realistically, most people benefit from a protector. They're inexpensive relative to the cost of replacing a stained or damaged mattress.

05Types of Mattress Protectors

Waterproof Protectors

The most common type. A breathable fabric top layer sits over a waterproof backing (usually polyurethane). These block liquid from reaching the mattress while still allowing airflow. Most are machine washable.

Allergen-Blocking / Encasements

Unlike standard protectors (which cover just the top and sides), encasements fully enclose the mattress with a zipper. They're more effective at blocking dust mites and allergens — and also the best option for bedbug protection. More difficult to put on and remove but offer complete coverage.

Cooling Protectors

Made with moisture-wicking or phase-change materials to help regulate temperature. Good option if you sleep hot and want protection without adding warmth.

Fitted Sheet Style vs. Encasement

• Fitted style: Easier to put on/take off, covers top and sides, good for general use
• Encasement: Fully encloses mattress, better allergen and pest protection, harder to remove for washing

06The Warranty Factor

This is the part people often overlook: most mattress warranties are voided by stains. Not just spills — sweat stains count too. Manufacturers use stains as evidence that the mattress was misused or stored improperly, which gives them reason to deny warranty claims.

If you spent $800+ on a mattress with a 10-year warranty, a $40 protector is a no-brainer. It keeps the warranty intact and extends how long the mattress performs at its best.

07What to Look for in a Mattress Protector

• Waterproof layer — essential for most households
• Breathable fabric — avoid hot, plasticky materials; look for terry cotton or tencel-style tops
• Deep pockets — should fit mattresses 10–15" deep comfortably
• Machine washable — you'll want to wash it every 1–2 months
• Noiseless — cheap protectors crinkle; quality ones don't

Browse our selection of mattress protectors — we carry options for every mattress size and sleep preference. If you have questions, our team at any of our LA Mattress Store locations can help you find the right fit.

08Frequently Asked Questions

Do I really need a mattress protector?

For most people, yes. It protects your mattress from moisture, stains, and allergens — and keeps your warranty valid. The cost is small compared to what a mattress costs to replace.

Will a mattress protector make my bed feel different?

A quality protector is thin and barely noticeable. Cheap protectors can feel crinkly or add slight warmth. Look for ones with soft fabric tops (terry, tencel, or cotton).

Does a mattress protector protect against bed bugs?

Standard protectors don't. For bed bug protection, you need a full encasement — a zippered cover that encloses the entire mattress.

How often should I wash a mattress protector?

Every 1–2 months under normal use. More frequently if you sweat heavily, have pets, or someone is sick.

What's the difference between a mattress protector and a mattress encasement?

A protector covers the top and sides. An encasement zips around the entire mattress for complete coverage. Encasements are better for allergen and pest control; protectors are easier to use day-to-day.

Can a mattress protector help with allergies?

Yes. It reduces the buildup of dust mites, pet dander, and other allergens in the mattress. For severe allergies, a full encasement provides more thorough protection than a standard protector.

Will a mattress protector void my mattress warranty?

No — it protects your warranty. Stains can void many mattress warranties; a protector helps prevent that.