Name: Mainstays Waterproof Soft Knit Mattress Protector, King- Fitted
Brand: Mainstays
SKU: 6000198584233
Price: 49.97 CAD
Availability: InStock
Rating: 4.2 (140 reviews)

Walmart US Ecommerce Website

GENERAL MERCHANDISE

PHARMACY

GROCERIES

VUDU

SPARK

PHOTO

ADVERTISING

SAVINGS CATCHER

GIFTCARDS

INHOME

AFFILIATE

ONEAPP

LOTUS

HELP

SMART_REORDER

GROCERY

CONV_COMMERCE

Buy Box Ad Container Module for Desktop

Custom HTML Module - About Klarna

I want delivery savings + more with

Try 30 days of free delivery + more! Choose your plan at checkout.

#2e2f32

NEW Fulfillment Tue Apr 15 2025 2:17 PM EDT

MTZ Team | Marquee 1 Ad | Item Page

MTZ Team | Marquee 2  Ad | Item Page

MTZ Team | Skyline Ad | Item Page

Other products of interest

MTZ Team | Sponsored Product Carousel - Item Page

More items to explore

MTZ Team | Sponsored Product Carousel - Item Page Broad 

NEW AddonServicesRedesign Fri Jul 18 2025 1:30 PM EDT

NEW AddToCart Mon Jul 14 2025 3:50 PM EDT

NEW AddToCart Tue Apr 15 2025 2:19 PM EDT

NEW Bill29Compliance Wed Sep 30 2026 9:44 AM EDT

NEW BrandBoxDisplayAd Mon Jul 14 2025 9:14 PM EDT

NEW BrandLink Wed Apr 23 2025 12:07 AM EDT

NEW Breadcrumb Mon Apr 07 2025 8:23 PM EDT

NEW Fulfillment Mon Jul 14 2025 4:00 PM EDT

NEW InternationalShipping Mon May 18 2026 1:02 PM EDT

New Item Page - Nutrition Value Placeholder Module, Wednesday, February 08, 2023, 5:11:53:90 pm

New Item Page - Product Description Placeholder Module, Wednesday, February 08, 2023, 5:14:04:38 pm

New Item Page - Product Ingredients Placeholder Module, Friday, February 10, 2023, 10:34:23:79 am

New Item Page - Product Specifications Placeholder Module, Wednesday, February 08, 2023, 5:15:29:61 pm

New Item Page - Reviews Placeholder Module, Wednesday, March 22, 2023, 10:04:29:34 am

New Item Related Shelves Module, Thursday, June 15, 2023, 6:08:51:10 am

Key item features

NEW ItemSnapshotHighlightsModule Fri Aug 28 2026 6:53 PM EDT

Specifications

NEW ItemSnapshotSpecificationModule Fri Sep 18 2026 1:18 PM EDT

 Price Match Policy

Prices, terms, and availability may vary online, in stores, and in–app. If the advertised price is not shown here, inventory at the advertised price may now be sold out. Please see the other offers, if available, while quantities last. Some items may be available from Marketplace Sellers, who set their own prices, and are not eligible for price match. Items sold in store by Walmart may be eligible for a price match to online items shipped and sold by Walmart. For variable weight items, price shown is an estimated price only – you will be charged for the actual weight of the item. See our

NEW LegalPriceDisclaimer Mon Jul 14 2025 4:11 PM EDT

NEW LegalPriceDisclaimer Wed Apr 30 2025 12:13 AM EDT

NEW ListsAndRegistries Tue Apr 15 2025 4:50 PM EDT

NEW PaymentPlans Mon Jul 14 2025 4:15 PM EDT

NEW PaymentPlans Tue Apr 15 2025 1:31 PM EDT

NEW PriceInformation Tue Apr 15 2025 1:30 PM EDT

NEW ProductFlags Thu Apr 10 2025 11:42 PM EDT

NEW ProductImages Tue Apr 15 2025 2:13 PM EDT

NEW ProductName Tue Apr 15 2025 12:53 PM EDT

NEW ProductReturnPolicyDetails Tue Dec 10 2024 3:17 PM EST

NEW ProductReturnPolicy Mon Jul 14 2025 5:04 PM EDT

Return Policy

NEW ProductReturnPolicy Tue Apr 15 2025 2:28 PM EDT

NEW ProductStickyBuyBox Wed Jul 02 2025 12:55 AM EDT

NEW PromoDiscount Tue Apr 15 2025 6:53 PM EDT

New SellersSecondaryBuyBox Module, Tuesday, September 05, 2023, 4:02:21:76 pm

Shop Confidently

NEW ShopWithConfidence Thu Jan 15 2026 2:20 PM EST

NEW SocialProofMessage Tue Apr 15 2025 7:17 PM EDT

NEW SoldAndShippedBy Mon Jul 14 2025 5:04 PM EDT

NEW SoldAndShippedBy Tue Apr 15 2025 2:23 PM EDT

New!

More savings, less stress.

HSK_Subscribetosave_E_v2

NEW SubscriptionOptionsModule Tue Apr 15 2025 6:44 PM EDT

NEW SubscriptionPriceMessage Wed Apr 23 2025 6:48 PM EDT

NEW Variants Wed Apr 23 2025 11:01 PM EDT

[Sticky] Bill29Compliance Thu Oct 22 2026 5:02 PM EDT

[Sticky] BuyBoxAd Mon Aug 11 2025 3:59 AM EDT

[Sticky] PriceInformation Mon Jul 14 2025 4:03 PM EDT

Syndigo

WRMC:Custom HTML Module - About SalesFinancing - Second update

Walmart Rewards Mastercard

WRMC:NEW FinancingOptions Tue Dec 10 2024 3:32 PM EST

#000000

Item Carousel - Rich Relevance 1

RR carousel

Item Carousel - Rich Relevance 2

RR carousel 2

Item Carousel - Rich Relevance 3

Mainstays Waterproof Soft Knit Mattress Protector, King- Fitted

Waterproof backing protects your mattress from accidental spills and everyday stains.

Blocks Spills and Stains

The soft knit fabric adds a layer of comfort without changing your mattress feel.

Soft and Cozy Knit

Stretches to fit mattresses up to 15 inches deep just like a fitted sheet.

Fits Deep Mattresses

You can machine wash and tumble dry on low for simple, hassle-free cleanup.

Easy Machine Washing

<ul><li>Soft Knit Comfort: Features soft knit fabric for added mattress comfort.</li><li>Waterproof Protection: Provides stain and spill protection with a waterproof laminate backing.</li><li>Deep Mattress Fit: Stretches to fit mattresses up to 15 inches deep.</li><li>Machine Washable Care: Allows for easy care with machine wash cold and tumble dry on delicate/low heat.</li></ul>

Waterproof <ul><li>Soft Knit Fabric adds a layer of comfort to your mattress</li><li>Waterproof provides stain and spill protection</li><li>Stretches to Fit mattresses up to 15 inches deep</li><li>Machine Washable for easy care</li><li>Easy Care Instructions machine wash cold, only non-chlorine bleach when needed. Tumble dry on lowest setting separately to avoid protector damage. Dryer temps vary by brand, use the lowest setting and remove when dry. Do not iron.</li></ul>

Bed Size

Water Resistance Level

Pocket Depth

Features

Mattress Encasement Type

Attachment Style

Material

Colour

Brand

Fabric Care Instructions

Thread Count

Has Written Warranty

Age Group

Keep your mattress clean and comfortable with the Mainstays Waterproof Fitted Soft Knit Mattress Protector. The waterproof laminate backing shields against everyday spills and stains while the soft knit fabric maintains the cozy look and feel of your mattress. This protector installs like a fitted sheet and stretches to accommodate mattresses up to 15 inches deep. Best of all, it’s machine washable for easy care!

Assembled Product Weight

Manufacturer Part Number

Assembled Product Dimensions (L x W x H)

Universal Product Code (UPC check)

Walmart Item #

fulfillment

title_shipToHome_date_delivery

Twin

Full

Queen

King

Mattress Fit

Softness

Value For Money

Ease Of Washing

Material Quality

Fabric

Comfort

Waterproofing

Size

The mattress cover is perfect for our king size bed. It looks beautiful. We're very happy with this.

Mainstays Waterproof Soft Knit Mattress Protector.

I like this cover! It has deep pockets with a tight fit over the mattress.
It does not move on the bed
In fact I went a bought another one for the other bedroom

Matress pad

walmart.com

Mainstays waterproof mattress cover

It was perfect. Strong plastic and fit my thick queen size mattress.

Excellent!

I have a 7 -8 inch foam mattress. The cover is very easy to put on and doesn't come off until you take it off. I bought 2 different covers. before this one and gave them away. This is the 2nd one of this mattress cover I have bought. Put one on the bed while the other is washing. Works great for me.

Perfect for my mattress

It claims to be water proof but it is not. I bought this cover for my mattress because it's soft and quite unlike the plastic ones (which I also have on the mattress under this cover) my daughter had an accident and it was wet on the plastic cover.I give it 2 stars for the sake that it is quite

Not waterproof

Thus pad is terrible! I gave it one star because A. I had to rate it 1-5 and B. Only because it is soft and not noisy at all. However, my son is a bed wetter and peed the very first night we had this on his bed and it soaked through this pad into his mattress. I'm so angry!! I bought this based on 3 friend's recommendations. They've had theirs a few years, so I'm wondering what this company changed about this pad?? Whatever it is, it's changed for the worse. I'm returning it ASAP

NOT WATERPROOF AT ALL

[Employee of walmartcanada] It is very bad   after once time washing it can't hold the water it's damage my Mattress

0 zero

I purchased this twice, and both times, the material wore out very quickly. The elasticity wears out very quickly so it does not stay in place covering my mattress. Then there's the issue where the material becomes shriveled and does not properly cover my mattress either. Total junk

Horrible quality and wears out quickly

I purchased this pad at my local store about 2 years ago. We had just bought a new mattress set and wanted to make sure that my little ones didn't have an accident and ruin our new mattress. In this 2 years, there have been no accidents, until today...my 3 year old fell asleep for her nap on my bed. When she woke, she had wet herself...I immediately went to check my bed, knowing that I would need to change the sheets/mattress protector. When I removed the WATERPROOF pad, my mattress is WET. I had always loved this product until today. 
*Note to self: When buying a waterproof mattress pad, perform your own test to check to make sure that it is indeed waterproof before committing to using it on your bed.

Mainstays Waterproof Soft Knit Mattress Protector, King- Fitted soft knit fitted protector with waterproof laminate backing and subtle knit texture; stretches to fit mattresses up to 15 inches deep and installs like a fitted sheet. Machine washable and often used to protect guest or RV mattresses.