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Best California King Mattress Protectors

Most people buy a mattress hoping it will give them a few years of comfort before needing to be replaced- even up to a decade worth of use if you invest in a higher-end mattress, to begin with. To make the most out of your mattress and to make sure that you get the best bang for your buck, you should do whatever you can to minimize the wear and tear your mattress gets- and that’s where mattress protectors come into play.

California king mattress protectors are designed, as the name suggests, to keep a California king size bed protected from stains and moisture, but that’s not all these protective covers can do. They add extra padding to a firm mattress, can help with dust mite allergies, or keep bed bugs away- the list of mattress protectors benefits just continues.

Rank Product Highlights
#1

Sleepsteady 100% Waterproof Mattress Protector

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  • Material: Tencel, polyurethane
  • Pocket depth: 18”
#2

Utopia Bedding Premium 135 GSM Waterproof Mattress Encasement

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  • Material: Polyester, PVC TPU
  • Pocket depth: 15”
#3

SafeRest King Size Premium Hypoallergenic Waterproof Mattress Protector

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  • Material: Cotton terry, polyurethane laminate
  • Pocket depth: 18”
#4

PlushDeluxe Premium Zippered Mattress Encasement

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  • Material: Cotton, PUL
  • Pocket depth: 12” to 15”
#5

Cosy House Collection Cal King Size Luxury Bamboo Hypoallergenic Waterproof Mattress Protector

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  • Material: Bamboo rayon, polyester
  • Pocket depth: 16”
#6

TASTELIFE Cal King Waterproof Mattress Pad Protector Cover

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  • Material: Polyester, TPU
  • Pocket depth: 18” to 21”

What Is a Mattress Protector?

Mattress protectors, mattress pads, mattress toppers, mattress encasements, and so on- there are plenty of ways to keep a mattress safe but not all offer the same design and benefits. Mattress protectors are designed with protection in mind- hence the name. These covers for mattresses can either completely encase the mattress or partially (like a fitted sheet does), depending on what type of protection you want. Fully encased mattress protectors are often used as a way to keep bed bugs from entering the mattresses the first place or to eradicate these pests- a fully encased mattress protector will prevent these critters from coming up to the surface and feeding on your blood, which will eventually lead to their death.

Fitted mattress protectors are not a good choice for bed bugs as they cover only the top and sometimes the sides of the mattress, but they’ll work wonders for everything else. Often waterproof, these will keep moisture and spills away from the mattress’s surface and prevent staining, dust, and dirt from accumulating on the mattress fabric cover. For people with pets and toddlers, this type of protection is all but a must, although everyone who wants their mattress clean and in top shape would benefit from having a mattress protector. Similarly, this bed accessory can be a great choice for allergy sufferers as they prevent contact with the allergen (dust mites living in your mattress) and minimize the chance for a reaction.

What to Look for in California King Mattress Protectors?

Now that you know that it’s a mattress protector you want and not an alternative such as a topper, there’s the issue of knowing what type of California king mattress protectors is worth it. The wrong choice could leave you hot and sweating, or let through moisture and fail its primary task- keeping the mattress protected.

Fitted vs encase California king mattress protectors

While both types of mattress protectors are a good choice- not all will work for your particular needs. If you are looking into California king mattress protectors to get rid of bed bugs, go for a fully enveloping mattress cover. If it’s protecting the mattress from wear and tear or anti-allergic properties you want, any of the two types will work for you.

Dimensions

Another thing to consider when choosing California king mattress protectors is the size. Cal king mattresses are the biggest option in standard bed sizes, so the protector should be big enough to accommodate a mattress that’s 72 inches wide and 84 inches long. Then there’s the issue of the mattress width- and it’s an important one. You’ll need to make sure that the protector fits snuggly for it to do its job and not slide around under the sheets, making a mess out of everything. Be sure to account for the profile of your mattress: hybrid mattresses and thick memory foam mattresses over 14” will need extra-deep pockets on a mattress protector for a perfect fit.

Moisture resistance

While water-resistant properties are always a welcome addition, they are not the essential feature for every sleeper so they’re not worth the extra cost in some cases. If you sleep with pets, have a clingy toddler that often sleeps over in your bed with you, have continence issues, or you’re a hot sleeper with night sweats, then waterproof California king mattress protectors are the best choice. The same goes for if you are a fan of breakfast in bed- that cup of coffee or glass of OJ can make a mess in the blink of the eye, resulting in stains and moisture in the center of the mattress. Preventing moisture from reaching the inside of the mattress is important, especially with memory foam: the buildup of moisture can create a perfect breeding ground for bacteria, mold, and mildew.

Type of material

California king mattress protectors come in all types of designs, which means that there are multiple fabric choices as well. If water-resistance is not an important factor to you, you can choose between both natural and synthetic materials. Breathable, hypoallergenic, and suited for sensitive skin, natural materials such as cotton, Tencel lyocell, or bamboo can be a great solution for hot sleepers as they let air circulate and feel cool to touch while protecting your mattress as well. On the other hand, man-made materials such as polyester, vinyl, polyurethane, or PVC boast greater durability, ease of maintenance, and water-resistant properties that could be essential to some people.

Padding

Unlike mattress toppers whose main role is to add padding to worn out or too firm mattresses, California king mattress protectors are not designed to add a layer of cushioning between you and the sleeping surface. Still, some may offer a thin layer of padding- which is just enough for some people to hit that sweet spot of comfort and sleep more soundly on their new firm mattress.

Maintenance

Even though- in most cases- the mattress protector isn’t in direct contact with the skin, that doesn’t mean it shouldn’t be washed frequently. A mattress protector is a barrier between the outside elements and your mattress, which means that all that grime you’re keeping away from the mattress is bound to stay on the protector- a buildup of dust, stains, and odors can be a common occurrence. This is why it’s always better to go for machine washable California king mattress protectors as the maintenance will be a breeze- and your new bed accessory will always be as clean and fresh-smelling as the first day.

Best California King Mattress Protectors

Sleepsteady 100% Waterproof Mattress Protector

Specs:

  • Material: Tencel, polyurethane
  • Pocket depth: 18”

Editor’s choice

Clever design and choice of materials allowed Sleepsteady to make a mattress protector that offers the best of both worlds: the soft natural Tencel material on top will feel luxuriously smooth and wick away moisture, whereas the polyurethane backing makes sure that the mattress protector stays fully waterproof. As a result, this mattress protector is breathable, noiseless, and fully efficient against dirt, moisture, and general wear and tear.

The deep pocket makes it a suitable choice for most mattresses on the market, its wide and thick skirt easily adjusting to all mattresses up to 18” thick. This fitted sheet style mattress protector can be machine washed and dried for your convenience- and to make sure it stays good as new for as long as possible.

Pros

  • The soft and breathable top fabric
  • Waterproof lining
  • Quiet
  • Deep and stretchy pocket
  • Machine washable and dryable

Cons

  • Could be cooler

Who Should Buy This Product?

If you want natural materials but still need the mattress protector to be waterproof- this is an excellent solution, particularly for people with pets or small kids.

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Utopia Bedding Premium 135 GSM Waterproof Mattress Encasement

Specs:

  • Material: Polyester, PVC TPU
  • Pocket depth: 15”

Runner up

If you don’t want to take any chances and need a fully waterproof, full encased mattress protector for your pricey Cali king mattress, Utopia Bedding delivers. Made with soft knitted polyester with PVC TPU backing, this cover is fully waterproof, soft to touch, and low maintenance. It will protect your mattress from all 6 sides and the zippered closure with a zip guard means that this protector keeps any unwanted critters away- or trapped inside without means to get to you.

The depth of 15” is not suited for some extra deep mattresses, but regular innerspring and most memory foam mattresses will fit snugly inside this fully encasing mattress protector. Hand washable or machine washed on mild, this easy to care for bed accessory is also certified by OEKO-TEX as free of any harmful substances.

Pros

  • 360-degree zipper with zip guard
  • Waterproof
  • Easy care
  • OEKO-TEX certified
  • Secures the mattress from all six sides

Cons

  • Runs large

Who Should Buy This Product?

For those that want a waterproof mattress protector that keeps bed bugs at bay, prevents allergens from reaching you, and safeguards the mattress from wear and tear, this fully zippered encasement is the way to go.

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SafeRest King Size Premium Hypoallergenic Waterproof Mattress Protector

Specs:

  • Material: Cotton terry, polyurethane laminate
  • Pocket depth: 18”

Customer’s choice

Hypoallergenic, gentle to the sensitive skin, and waterproof to boot: SafeRest managed to create a mattress protector that is safe for people with allergies and eczema, children, and pets alike. The gentle cotton terry on top is breathable and soft, and the OEKO-TEX certificate guarantees that there are no harmful substances present in the fabric. The membrane back coating is PUL (like that used on cloth diapers) and will successfully repel liquids while still being free of vinyl, phthalates, and PVC.

This fitted mattress protector will suit mattresses up to 18” thick, which leaves plenty of space for most mattresses to snugly fit in. Additionally, you can also simply throw in this protector with your sheets to wash and tumble dry on low for effortless maintenance.

Pros

  • Hypoallergenic
  • Soft to touch
  • Breathable
  • Safe for sensitive skin, kids, pets
  • Waterproof
  • Low maintenance

Cons

  • Could be more durable

Who Should Buy This Product?

No need to compromise on safety to get a reliable waterproof mattress protector: made for gentle skin, this OEKO-TEX certified hypoallergenic mattress cover will keep your mattress fully protected.

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PlushDeluxe Premium Zippered Mattress Encasement

Specs:

  • Material: Cotton, PUL
  • Pocket depth: 12” to 15”

Best California king mattress protector for bed bugs

No one likes the thought of dealing with these nasty blood-sucking parasites- but if you suspect you already have them in your mattress or want to make sure infestation never happens, a high-quality mattress encasement is a must. PlushDeluxe designed a bed bug proof mattress protector for Cali king mattresses that is 6 sided and boasts an invisible zipper specifically to combat these pests- with a myriad of handy features that follow. The soft cotton top is soft to touch and the membrane backing keeps liquids away from the mattress- without involving vinyl, phthalates, or PVC to do it.

The adjustable pocket can adapt to mattresses that are between 12” and 15” thick, so this is a great solution for standard mattresses that find deep pocket mattress protectors too large for their needs.

Pros

  • Invisible zipper secured with a velcro flap
  • 6-sided mattress protection
  • Blocks allergens and bedbugs
  • Repels liquids

Cons

  • Difficult to get on and off

Who Should Buy This Product?

When bed bugs are an issue- or you want to prevent them from becoming one- this fully encased waterproof mattress protector will make sure you can do that without much hassle- all the while enjoying its waterproof and hypoallergenic properties to boot.

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Cosy House Collection Cal King Size Luxury Bamboo Hypoallergenic Waterproof Mattress Protector

Specs:

  • Material: Bamboo rayon, polyester
  • Pocket depth: 16”

Best California king mattress protector for hot sleepers

For hot sleepers, a mattress protector can become a huge issue: often backed with waterproof materials that don’t let air through or made from synthetic materials alone, these protective covers can trap heat and only exacerbate your overheating and sweating. But that’s not the case with this mattress protector for hot sleepers as Cosy House Collection manages to maintain breathability and coolness while ensuring your mattress stays as safe as it gets.

The combination of 70% natural bamboo rayon and 30% polyester allows air to circulate and keeps temperature neutral in the bed, while the double-layer membrane backing prevents moisture from seeping into the bed. Designed like a fitted sheet, this machine washable and dryable mattress cover will suit mattresses up to 16” thick.

Pros

  • The bamboo fabric stays cool
  • Breathable and temperature neutral
  • Waterproof backing
  • Phthalate, vinyl, and PVC free

Cons

  • Crinkly

Who Should Buy This Product?

In case you are worried about the mattress protector causing you to overheat, worry not: this cooling bamboo mattress cover will do the job without raising the temperature in bed.

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TASTELIFE Cal King Waterproof Mattress Pad Protector Cover

Specs:

  • Material: Polyester, TPU
  • Pocket depth: 18” to 21”

Best waterproof California king mattress protector

Whether you sometimes share your bed with a toddler that is yet to be potty trained, have incontinence issues, or want to prevent your pet’s barf or urine from soaking the bed when an ‘accident’ happens, you need a reliably waterproof mattress cover- and TASTELIFE delivers. The unique combo of poly-blend top and NBH2O TPU back coating makes this a truly waterproof mattress protection that will not let that spilled coffee or pee seep through to the mattress. And it does so without disrupting your peace of mind- the TPU used for backing is certified by SGS as free of PVC, vinyl, phthalates, fire retardants, and other toxic chemicals.

Better yet, the deep pocket that is 18” deep and stretches to accommodate mattresses up to 21” thick will easily suit even the higher profile mattress on the market, making it a snug fit for most. Add to that the fact that it can be machine washed and dried, and you get a really low maintenance waterproof mattress protector that you can rely on.

Pros

  • Suited for people with incontinence, pets, or small kids
  • TPU backing repels liquids
  • Durable
  • Easy to keep clean
  • Certified by SGS
  • Extra deep pockets

Cons

  • Traps heat

Who Should Buy This Product?

Water-resistant backing is not enough when you spill a drink in bed or have a pet or toddler pee in it: this is why this fully waterproof heavy-duty mattress cover is an excellent choice if you need something able to keep any kind of liquid away.

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Bottom Line

California king mattress protectors keep your expensive mattress from wear and tear and prolong its service life: without moisture, stains, dirt, and other elements to damage it, your mattress will stay in its original condition for far longer. Additionally, California king mattress protectors can offer some extra padding to improve your comfort, or a design that ensures that you are protected from allergens or pesky critters such as bed bugs- this nifty bed accessory is inexpensive, easy to use, and yet it boasts so many benefits.