King mattress protectors size details

Size: 183 × 203 cm
Side Protection:  Advanced Expandall® fitted sheets perfect for every mattress.
Price: $209

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Why choose our king bed mattress protector?

Our mattress protectors are an excellent choice for extending the life of a mattress and improving sleep quality. 

Our king mattress protectors are waterproof and hypoallergenic, ensuring you and your family won’t be bothered by common allergens like dust or mites. They’re so good at protecting those with allergen sensitivities that the National Asthma Council has approved them for its Sensitive Choice program.

Forget your basic cotton or bamboo mattress protector; our protectors are waterproof and made from a wood-based fibre (called Tencel) that offers round-the-clock comfort and ease. It’s a superior waterproof and hypoallergenic mattress protector compared with most others out there.

No-sweat and no-crinkle

Some mattress protectors can keep you awake with crinkly noises or because they breathe poorly and cause you to sweat. Our waterproof fitted mattress protector will keep you cool and rested, thanks to the no-sweat and no-crinkle design.


Thanks to our National Asthma Council-approved mattress protectors, you and your family can sleep safely without worrying about allergens. A peaceful night’s sleep begins with peace of mind.

Machine washable

Our king bed mattress protectors are easy to remove, launder and replace. Just pop them in a washing machine set to hot and then drop into a dryer on high. We always recommend heat in washing and drying since it assists with sanitation.

10-Year Stain Proof Guarantee

We also offer a 10 Year Stain Proof Guarantee on all mattresses purchased with our mattress protectors. We’re that confident in our mattress protectors!

Awarded #1 Overall Mattress in a Box out of hundreds of products tested.

What our customers have to say

Frequently Asked Questions

We highly recommend you acquire a mattress protector. It’s the best, most practical way of guaranteeing a mattress stays free of stains and spillages, not to mention keeping you and your loved ones safe from dust mites and allergens.

You can. Our king mattress protectors are designed to be as easy to use as possible. They benefit from washing them at higher temperatures, so you can rest assured of maximum sanitation.

Yes. Even if you have a thick and generous memory foam mattress topper, our mattress protector will be suitable and can still cover both the topper and the mattress.

A trick question! The best waterproof mattress protector on the market today is made of Tencel. It’s hardy enough to stand up to wash after wash, and it’s also a natural, breathable fabric. Being softer than you can imagine, our Tencel mattress protector must be experienced to be believed.

Not at all. Some mattress protectors can make people sweat while they sleep, but the Sleep Republic king bed mattress protector benefits from its Tencel material. 

Made of wood-based fibres, Tencel is a breathable fabric designed to keep you warm in winter and cool in summer. It’s not just empty marketing communications or mumbo jumbo. Waterproof mattress protectors really don’t come any better than this.

Yes, mattress protectors are worth it if keeping your mattress fresh is important to you.

It makes sense to protect the significant investment a mattress represents. For only a small price, you can prolong the lifetime of your mattress by keeping it fresh and free of soiling and stains. For a mattress protector king-size, queen-size and even king single beds benefit from, check out our Tencel protectors today!

There are hundreds of mattress protectors out there available for purchase. 

But what sets the top brands apart from the rest? Mattress protectors from top brands do everything right because they do not skimp on quality. At Sleep Republic, we pride ourselves on the uncompromising quality of all our products, including our mattress protectors.

To save you time and money, we’ve developed one to meet all of your needs, with features like:

  • Natural material
  • Waterproof
  • Breathable (won’t cause sweating)
  • Antibacterial
  • Quiet (won’t crinkle noisily)
  • OEKO-TE certified (asthma-friendly)
  • In multiple sizes
  • The option to machine wash, even in a large commercial machine

So why not bundle it with a mattress purchase and save even more?

We do offer free shipping! We typically have stock availability year-round, so whether you’re after a protector for a super king, queen, double, single, or anything else, you can have free delivery with your Sleep Republic product.