Top 10 Best King Size Waterproof Mattress Protectors Reviewed for 2020

You have a king size mattress, which was probably expensive even if you got it with a discount or perhaps second hand. Protecting it from spills and accidents should be your priority if you want it to last as long as possible, since moisture inside of it can lead to mold and other detrimental conditions which do not bode well for extending its usable life. The best solution for your need would be a waterproof mattress protector of the appropriate size for your mattress, which will ensure that it won’t matter even if you do end up having some unforeseen incidents. Whether you have kids or pets, are incontinent, are prone to spilling things, or all of the above, a mattress protector will help to extend your mattress’s life and protect it from unsightly stains and spots.

While you might realise the importance of protecting your king size mattress from accidents and spills because you know that they’re kind of inevitable, it can be a little bit trickier to settle on which mattress protector would best suit your needs and requirements. There is a considerable amount of variation between the products out there on the market, in terms of both cost and quality. Picking the right one can indeed be quite difficult, which is exactly the reason for having this handy guide to help you choose. As such, we’ll go over everything you need to know about waterproof mattress protectors, and we’ve also compiled a list of the top products which will suit your king size mattress protection needs.

We’ve based our preferences on the experiences of real customers, in addition to our own research and analysis on the points which will be most relevant to you when making a purchase. We hope that this list can assist you in making your final purchase decision, and that you will be satisfied with whichever product you ultimately choose (even if there’s really no such thing as a perfect pad). We’ve done our homework, so that you don’t really have to.

PRODUCT REVIEWS

1. SafeRest King Size Premium Hypoallergenic Waterproof Mattress Protector
Product Link: https://www.amazon.com/SafeRest-Hypoallergenic-Waterproof-Mattress-Protector/dp/B003PWK2A8/\

This hypoallergenic mattress protector will protect your king size mattress from any moisture damage, and it shouldn’t trigger your allergies or trap too much dust inside. Another added benefit is that it is completely free of vinyl, and it even comes with a full 10 year warranty on top of everything else. Made with a waterproof membrane back cover and a cotton top, this protector shouldn’t change the feel of your mattress in any noticeable way. Regardless of what sort of mattress you have, it will feel the same as it always has.
While it’s great to protect your mattress from moisture and fluids, it’s even better if you can protect it from dust mites, allergens, and bacteria. This particular model is designed to prevent dust mites from passing through its top surface, which means that they won’t have a space where they can reproduce and further irritate your allergies. This makes it easier to control your sleeping environment and can help in ensuring better air quality overall, which in turn could mean an improvement in your allergy symptoms.
While this mattress protector is completely waterproof,

Pros:
Does not affect the feel of your mattress
10-year replacement warranty
Machine washable

Cons:
Thinner than some of the competition
Some customers claim that urine causes the waterproof layer to disintegrate

2. LINENSPA Premium Smooth Fabric Mattress Protector – budget
Product Link: https://www.amazon.com/LINENSPA-Premium-Smooth-Mattress-Protector/dp/B00MW50EDY/

This budget option may be ideal for you if you’re looking to protect your mattress, but don’t necessarily have a big budget to spend on doing so. Like the previous model, this one is thin and should neither change the feel of your mattress nor make a bunch of crinkling noises when you roll over in the night. Indeed, with a cotton top and a polyurethane backing and the fact that this is machine washable, this protector is very similar to the previous listing.
One interesting thing about this particular mattress protector is that you have a choice between a top-only version and one that covers the sides as well. Since there’s not a significant difference between the two, it basically comes down to your personal preference.

Pros:
Very affordable budget option
Choose between top-only and 5-sided model
Machine washable

Cons:
Some debate about whether or not it is actually fully waterproof
Cheap construction

3. King Size Luna Premium Hypoallergenic Waterproof Mattress Protector – Made in The USA
Product Link: https://www.amazon.com/Luna-Hypoallergenic-Waterproof-Mattress-Protector/dp/B002AQPUW0/

If you’re looking for a mattress protector that’s not too hard on your budget but are wary of cheaply-made Chinese products, this might be the best choice for you. With a 15-year warranty, you shouldn’t be too concerned about being an unsatisfied customer with this particular model. Aside from that, this is a hypoallergenic mattress cover designed to protect your bed from spills and accidents without changing the way it feels.
While this mattress cover will protect your bed from spills and accidents, the material is made so that air can pass through. Allowing your mattress to “breathe” can further help in extending its usable life. In spite of all of this, there’s no vinyl or PVC used in this product, which means that it will be much quieter and much less sweaty to sleep on.

Pros:
15-year replacement warranty
Made in the USA
More breathable fabric used in construction
No vinyl, PVC, or phthalates used

Cons:
Is capable of disintegrating after several years of use, which doesn’t protect your bed
In spite of being hypoallergenic, can still smell like plastic

4. Utopia Bedding Bamboo Mattress Protector – 100% Waterproof
Product Link: https://www.amazon.com/Utopia-Bedding-Waterproof-Mattress-Protector/dp/B01E02DU1O/

The first thing that stands out about this king size mattress protector is the use of bamboo-derived rayon along with polyester in its construction. It’s also breathable in spite of being waterproof, which means that your mattress can breathe and thus extend its life as well as allowing you to stay cool through the night. On top of that, bamboo fiber is generally cooler and more comfortable to sleep on anyway, especially in comparison to synthetic materials. This is especially true if you happen to use a memory foam mattress, and indeed you might notice your bed becoming more comfortable after putting this one on it.
Another feature of this mattress is the use of a smooth grip system, which will allow the mattress protector to stay in place even if you toss and turn all night long and share your bed with a St. Bernard.
Avoiding the use of harsh solvents or chemical bleach helps any mattress protector to last longer and not disintegrate. Furthermore, it should be noted that you should have another person assisting you during the installation process, as uneven pressure on this pad during installation can lead to damage.

Pros:
Tends to be cool and comfortable, owing to the fabric
Absorbs a lot of liquid
Doesn’t feel cheap

Cons:
Will become functionally useless if you don’t follow the washing/drying instructions
Doesn’t necessarily retain its shape the way it should

5. SureGuard Mattress Protector King Size – premium
Product Link: https://www.amazon.com/SureGuard-Mattress-Protectors-Queen-Size/dp/B00EJOYNBA/

In case you hadn’t noticed by now, all of the products we’ve talked about so far in this list basically have similar features to one another. Here again we have another mattress protector (in king size) with a cotton top layer and a waterproof layer underneath. This one too is machine washable and doesn’t make a lot of noise when you roll over in your sleep. Like a number of comparable products, this too will allow you to sleep without waking up in a pool of your own sweat because it’s breathable.
What might make this particular product stand out from a rather crowded market is the excellent customer service. This company has been known to find folks who’ve written less than positive reviews and replace the product, which holds true for those who don’t like its fit as well as complaints about performance.

Pros:
Breathable fabric
Excellent customer service response, including a 30 day money-back guarantee
No noise

Cons:
Will cease to be functional if you can’t be bothered to follow the washing/drying instructions
May not fit your bed so snugly

6. ZAMAT Premium 100% Waterproof Mattress Protector
Product Link: https://www.amazon.com/ZAMAT-Waterproof-Protector-Breathable-Hypoallergenic/dp/B07RJG2JXN/

Here’s another mattress protector whose features don’t stand out a lot from the crowd, except for having slightly higher customer satisfaction than the competition. Whether this is due to more clear care instructions for this mattress protector than its competitors or better-quality construction could be up for debate, the fact remains that fewer customers have noted how certain liquids leak right through than with comparable products.
Unlike some of the other products we’ve listed here, this one is somewhat less absorbent than comparable ones – but customers note how liquids will just bead on it instead. This property is great because it prevents liquids from soaking through to the mattress, but it’s a bit less advantageous when the products sides don’t happen to be waterproof. It’s probably fine for the occasional spill or cat vomit, but if you have a child who wets the bed (and happens to pee a lot) then it might mean the sides of your mattress ending up with some moisture damage.

Pros:
24/7 customer service
10 year warranty
Tight-fitting elastic band means that it should stay in place

Cons:
Cannot be machine dried
Not that absorbent
Elastic sides aren’t waterproof

7. UltraBlock King Size Waterproof Mattress Protector
Product Link: https://www.amazon.com/UltraBlock-King-Waterproof-Mattress-Protector/dp/B013RK6R42/

The UltraBlock is an extremely thin, waterproof mattress protector that should not in any way be mistaken to be a mattress pad because it definitely isn’t one. That should be good for some users, especially those using a memory foam mattress that is designed to form to your body when you lie down – something which thicker mattress pads can interfere with. Because of this thinness and the fact that it’s waterproof, this mattress protector will not absorb water but will allow it to run off – which could mean the sides of your mattress potentially getting damp.
Like most of the other products on this list, this mattress protector has very specific instructions to be followed for washing it. This is important to note so that the product dries properly, as well as to extend the useable life of the product.

Pros:
Seems to be very much waterproof
No PVC or Vinyl
Hypoallergenic

Cons:
Complicated to launder
Apparently is useless for dog urine

8. LUCID Premium Hypoallergenic 100% Waterproof Mattress Protector
Product Link: https://www.amazon.com/LUCID-Hypoallergenic-Waterproof-Protector-15-Warranty-Vinyl/dp/B00A2G9UDA

This fitted sheet style mattress protector comes with a 15-year warranty, and it’s ultra-thin and breathable so that you don’t even notice its presence on your king sized mattress. It’s also completely waterproof, meaning that while some other models have a layer terrycloth that could potentially absorb liquids and cause them to leak through, liquids will simply pool on this one. In other words, this would be great if you really don’t want any seepage or leakage whatsoever.
The LUCID is also quiet, so if you toss and turn in your sleep, you needn’t worry about being woken up by the sound of plastic crinkling. In addition to that, it is great for users with allergies because it will seal off all of the dust in your mattress. All in all, this looks like a great option to protect your mattress if you don’t wish to have to think too much about it.

Pros:
15-year warranty
Completely waterproof
No noise

Cons:
Very thin
Liquids may run down the sides, as this is not absorbent at all.

9. PlushDeluxe Premium Zippered Mattress Encasement Protector
Product Link: https://www.amazon.com/dp/B06XR1YGM9/ref=twister_B06XR3HZZW

This 6-sided mattress encasement will seal off your mattress from the outside world, rather than protecting just the top and maybe the sides. This is great for folks with allergies, since it should prevent dust from entering or escaping your mattress and irritating you when you’re trying to sleep. Like all of the other choices on this list, it’s also free from vinyl, phthalates, and PVC.
With a 10-year replacement warranty and an ultra-thin design that should not noticeably change the feel of your mattress, this is another valid option worthy of your consideration. All of that said, it would appear that this mattress protector is a bit more snug than what the instructions say – meaning that if you have a thicker mattress, it may not actually fit.

Pros:
10-year warranty
Protection on all sides
Hidden zipper

Cons:
May be a bit more snug than what the instructions say
Needs 2 people for installation

10. PlushBeds Organic Cotton Mattress Protector
Product Link: https://www.plushbeds.com/organic-cotton-mattress-protector.html

This organic cotton mattress protector stands out from the others because of the use of organic cotton, which would go great with organic cotton bedsheets. Since there are a large number of agrochemicals used in the production of non-organic cotton, the main advantage of this one is that there’s no chance of residual pesticides in the fabric. If you’re particularly sensitive to certain chemicals, this is a good option because it happens to lack them. Another added bonus is that organic cotton tends to feel softer than cotton grown through conventional methods, as the fibres are not broken down by the chemicals used during farming and processing.
One obvious thing here is that no matter what, polyurethane is definitely not organic – so this mattress protector cannot be listed as being fully organic. That being said, polyurethane is very much safe and waterproof, and so it should do its job while still being hypoallergenic.

Pros:
Organic cotton makes it softer and free of chemicals
Polyurethane isn’t organic, but will ensure that it’s waterproof without causing irritation
Relatively durable

Cons:
More costly than the other options on this list
Not 100% organic, since it uses polyurethane in the waterproof backing

11. THE NECTAR MATTRESS PROTECTOR
Product Link: https://www.nectarsleep.com/mattress-protector

This product is designed for use with the Nectar mattress, but it’s the perfect protector for any mattress. It will help you stay warm in the winter and cool in the summer, and it comes with a plush padded layer for added comfort. If you want to protect your mattress with a comfortable and noise-free option, then it’s definitely worth your time to look into this model. In spite of having a bit more of padding, this mattress protector is still fully breathable.
This mattress protector comes with the same quilted top as the Nectar mattress, so no matter if you want to retain the feel of your Nectar or just want to have a more premium-feeling mattress then this is a great choice. It’s also rather durable and will fit seamlessly to your king size mattress – so it will look nice and last a long time.

Pros:
Durable
Quilted cotton top for added comfort
Nice looking for a mattress protector
Cons:
On the costlier end of the spectrum compared to most of the other products listed here
Quilted, so it makes your bed thicker

CONCLUSION

Finding the right mattress protector for your needs isn’t always the simplest choice to make, given the number of different options on the market. This is especially true when it may likely seem that there’s no such thing as the ideal mattress protector, with the number of products out there which have received some amount of unsatisfactory customer feedback in spite of following care instructions. No matter which product you ultimately choose, you absolutely should follow the care instructions if you want it to last and to actually protect your mattress the way it should.
Though there aren’t a lot of major differences between the products on this list, our top choice would have to be the Utopia Bedding Bamboo Mattress Protector because of the use of bamboo viscose in its construction. The bamboo fabric means that it’s much more cool and comfortable to sleep on, no matter what sort of mattress you’re using it to protect. As this product is also very absorbent, you need not worry about liquids running off of the top and soaking into the sides of the mattress as with some products. If you want a cool and comfortable sleep every night without having to worry about spills or accidents, this should be the ideal product for your needs – though a close runner-up is the PlushBeds Organic Cotton Mattress Protector.