Trending:
Cat
Massager
sock
  • Best Sellers
  • New Arrivals
  • Clearance
  • Membership
  • Your Account
  • Support

Account

  • Sign in with Email
  • Sign in with Apple
  • Sign in with Facebook
  • By continuing, you agree to our terms of use and privacy policy.

Help

  • Support
  • Frequently Asked Questions
  • Warranty & Returns

Membership

$5.99/month gets you free shipping and more.

  • What Is Membership?
  • Become a Member

Search

  • Trending

    • Cat
    • Massager
    • sock
    • Dog
    • Pet
    • Slippers
    • Heater

Market

  • Best Sellers
    1. Calphalon Premier 8-Piece Stainless Steel Cookware Set
    2. Moen Elongated Electric Heated Bidet Seat
    3. Pick-Your-80-Pack: KIND Healthy Grains Energy Bars 100+ Sold
    4. Ecovacs YEEDI Cube Pro Robotic Vacuum and Scrubbing Mop
    5. Luminara 4-Piece Flameless Smooth & Glitter Candles
    6. 2-Pack: LifeStraw Go 24oz Stainless Steel Insulated Water Filter Bottle
    7. 36-Pack: Matador Energy Shots Variety 100+ Sold
    8. 6-Pack: Nature's Craft Liquid Vegan B Complex Drops
    9. Kenwood 700 Watt Portable Power Station
    10. Sonos One SL Wireless Speaker (Certified Renewed)
  • New Arrivals
    1. Vornado CYLO51 True HEPA 3-Stage Air Purifier NEW 5 hours ago
    2. Samsonite Centric 2-Piece Hardside Expandable Luggage Set NEW 13 hours ago
    3. Toyventive Toddler's First Words Smart Baby Box Learning Set NEW 13 hours ago
    4. Travelon Anti-Theft Classic Vertical Crossbody Bag NEW 13 hours ago
    5. Mynt 3-Mode Travel Nose Contour Eye Mask NEW 13 hours ago
    6. Marathon Dimmable Curved Display LED Clock NEW 13 hours ago
    7. Satechi 108W Pro USB C PD Desktop Charging Station NEW 13 hours ago
    8. Zuzee Tire Inflator Portable Air Compressor NEW 13 hours ago
    9. Cuisinart Die-Cast Juicer Machine NEW 13 hours ago
    10. Atomic Beam Night Hero Binoculars Deluxe Edition NEW 16 hours ago
  • Clearance
    1. Temp-Tations 4-Piece Striped Glass Dessert Plates (8")
    2. 2-Pack: Georgia Brown Seasonal Metal Illusion Spinners (Trick or Treat)
    3. Kathy Ireland Zinnia Scuff Slippers
    4. American Flyer Knox 3-Piece Hardside Luggage Set 5 left
    5. 8-Pack: Rhonda Shear Ahh! Seamless Briefs
    6. Kathy Ireland Marigold Scuff Slippers
    7. Born Rib Knit Clog Slippers 8 left
    8. 4-Pack: Rhonda Shear Ahh Briefs
    9. Born Faux Fur Crisscross Slide With Faux Suede Trim
    10. MUK LUKS Flexi Bridgehampton Boots
  • SideDeal
  • SideDeal Market

UltraBlock UltraPlush King-Size Mattress Protector

Product image Product image Protects against spills, stains, allergens, & dust mites Top side features a soft cotton material to keep your mattress breathable Underside is waterproof & protective creating a barrier that repels liquids without sacrificing comfort

  1. Product image
  2. Product image
  3. Protects against spills, stains, allergens, & dust mites
  4. Top side features a soft cotton material to keep your mattress breathable
  5. Underside is waterproof & protective creating a barrier that repels liquids without sacrificing comfort
$35 save 29%
$24.99

Sleep peacefully knowing your king-size mattress is fully protected with the UltraBlock UltraPlush Mattress Protector. Offering premium waterproof defense against spills and allergens, this protector ensures a comfortable and hygienic sleeping environment. Experience luxurious comfort and reliable protection with UltraBlock, the ultimate choice for safeguarding your mattress investment.

Customer Favorite

★ ★ ★ ★ ★
★ ★ ★ ★ ★
★ ★ ★ ★ ★
★ ★ ★ ★ ★
4.4 Overall Rating

A product’s star rating is based on a Machine Learning model instead of a raw data average. This model takes into account various factors used to improve the confidence in our star ratings.

5 stars
90%
4 stars
0%
3 stars
0%
2 stars
10%
1 star
0%
★ ★ ★ ★ ★
Verified Purchase

Mattress pad

Very nice! I worked in a bedding store, our waterproof mattress covers, same caliber, were $149 and that was 10 years ago. Would order 2 more, queen size this time for other beds.

Written by @beachdreamer199 - July 29th 2025
★ ★ ★ ★ ★
Verified Purchase

King size waterproof mattress protecter

I love it , it is so soft.

Written by @user19019313 - February 22nd 2025
★ ★ ★ ★ ★
Verified Purchase

Ultra Protection

my grandchild is forever spilling something on my bed now I’ve got protection!

Written by @trishylo - June 4th 2024
See All Reviews

Features

  • Premium Protection: Safeguard your king-size mattress against spills, stains, allergens, and dust mites with the UltraBlock UltraPlush Mattress Protector
  • Waterproof Barrier: Featuring a waterproof membrane, this protector creates a barrier that repels liquids without sacrificing comfort
  • Allergy Relief: Hypoallergenic and resistant to allergens, dust mites, and bacteria, this protector helps alleviate allergy symptoms for a healthier sleep environment
  • UltraPlush Comfort: Made with soft and breathable fabric, this mattress protector offers a luxurious feel that enhances your sleeping experience
  • Secure Fit: Designed to fit king-size mattresses up to 18 inches deep, this protector features elasticized edges for a snug and secure fit that won’t bunch up or slip off
  • Quiet Protection: Enjoy quiet and discreet protection that doesn’t disrupt your sleep, thanks to the noiseless fabric of this mattress protector
  • Easy Maintenance: Machine washable and tumble dry friendly, this protector is easy to clean and maintain for long-lasting freshness and hygiene
  • Durable Construction: Built to withstand daily wear and tear, this mattress protector is crafted with high-quality materials for lasting durability

How To Wash Your Mattress Protector

  1. Arrange the protector in the washer so that the plush side faces the drum
  2. Machine wash warm, rinse cold
  3. Avoid washing with sharp objects, as they may puncture the waterproof backing
  4. Tumble dry low only. For fast results, add 1-2 large towels to the dryer
  5. Wash before first use, and monthly thereafter

Specifications

Size King
Fabric Type Cotton
Special Feature Waterproof
Product Dimensions 14 x 10 x 5 inches
Item Weight 2.99 pounds

What’s Included?

  • 1x UltraBlock UltraPlush King-Size Mattress Protector

Warranty

90 days

Estimated Delivery Date

Monday, Nov 24 - Friday, Nov 28

Reviews

★ ★ ★ ★ ★
Verified Purchase

Mattress pad

Very nice! I worked in a bedding store, our waterproof mattress covers, same caliber, were $149 and that was 10 years ago. Would order 2 more, queen size this time for other beds.

Written by @beachdreamer199 - July 29th 2025
★ ★ ★ ★ ★
Verified Purchase

King size waterproof mattress protecter

I love it , it is so soft.

Written by @user19019313 - February 22nd 2025
★ ★ ★ ★ ★
Verified Purchase

Ultra Protection

my grandchild is forever spilling something on my bed now I’ve got protection!

Written by @trishylo - June 4th 2024
★ ★ ★ ★ ★
Verified Purchase

Happiness

Glad I was able to get this and the price is great

Written by @Goodgirl71 - September 10th 2024
★ ★ ★ ★ ★
Verified Purchase

exactly what you need if you have kids, or pets

love it

Written by @pattyswan1 - March 27th 2024
★ ★ ★ ★ ★
Verified Purchase

Great product and price

Written by @mmarwell - February 1st 2025
★ ★ ★ ★ ★
Verified Purchase

I love my product

Written by @user44610866 - December 5th 2024
★ ★ ★ ★ ★
Verified Purchase

Plush.

The product is describes
as Ultra Plush. It has no body at all. It does have the plastic barrier, and is very thin. I hope it does not tear during normal body movement while sleeping.

Written by @user10555650 - April 18th 2024

Best Sellers

Calphalon Premier 8-Piece Stainless Steel Cookware Set
$400 $149.99 save 63%

Calphalon Premier 8-Piece Stainless Steel Cookware Set

Moen Elongated Electric Heated Bidet Seat
$305 $119.99 save 61%

Moen Elongated Electric Heated Bidet Seat

Pick-Your-80-Pack: KIND Healthy Grains Energy Bars
$56 80 for $39 save 30%

Pick-Your-80-Pack: KIND Healthy Grains Energy Bars

Ecovacs YEEDI Cube Pro Robotic Vacuum and Scrubbing Mop
$800 $229.99 save 71%

Ecovacs YEEDI Cube Pro Robotic Vacuum and Scrubbing Mop

Luminara 4-Piece Flameless Smooth & Glitter Candles
$127 $39.99 save 69%

Luminara 4-Piece Flameless Smooth & Glitter Candles

2-Pack: LifeStraw Go 24oz Stainless Steel Insulated Water Filter Bottle
$100 2 for $49.99 save 50%

2-Pack: LifeStraw Go 24oz Stainless Steel Insulated Water Filter Bottle

36-Pack: Matador Energy Shots Variety
$114 36 for $14.99 save 87%

36-Pack: Matador Energy Shots Variety

6-Pack: Nature's Craft Liquid Vegan B Complex Drops
$96 6 for $29.99 save 69%

6-Pack: Nature's Craft Liquid Vegan B Complex Drops

Kenwood 700 Watt Portable Power Station
$800 $399.99 save 50%

Kenwood 700 Watt Portable Power Station

You May Also Like

Delightfully Random Gadgets & Gear

Delightfully Random Gadgets & Gear

Surprises you didn’t shop for but will be glad you found

Last of the Awesome Finds

Last of the Awesome Finds

If it’s still here, it probably won’t be for long

Surprisingly Useful Things You’ll Actually Grab

Surprisingly Useful Things You’ll Actually Grab

Strange, practical, and weirdly satisfying picks for everyone

Camping & Hiking Gear That Survives You

Camping & Hiking Gear That Survives You

Outdoorsy finds for the mostly capable adventurer

Galaxy by Harvic Essentials Worth Owning

Galaxy by Harvic Essentials Worth Owning

Turns out your basics can actually be, well, good

Cozy Autumn Comforts

Cozy Autumn Comforts

Perfect for nights in, snacks, and not leaving the house

Useful Things Under $30 (That Don’t Feel Cheap)

Useful Things Under $30 (That Don’t Feel Cheap)

Go ahead, upgrade the small joys in life

Curated Chaos: Surprisingly Great Finds for All Occasions

Curated Chaos: Surprisingly Great Finds for All Occasions

It's a grab bag, but with actual taste (yours)

Kitchen & Dining Gear You Might Actually Use

Kitchen & Dining Gear You Might Actually Use

For takeout nights, meal preppers, and food dabblers alike

Almost Gone, Still Worth Grabbing

Almost Gone, Still Worth Grabbing

Blame us, not yourself, if you miss these extras

Organization Wins for the Basically Messy

Organization Wins for the Basically Messy

Because every drawer deserves a second (organized) chance

Energy-Saving Gadgets for Real Life

Energy-Saving Gadgets for Real Life

Cut your bills, not your comfort, one device at a time.

Thanksgiving Host Survival Kit

Thanksgiving Host Survival Kit

Everything you need to look like you have things under control.

Holiday Prep for Witness Protection Recruits

Holiday Prep for Witness Protection Recruits

Blend in, stand out, and snack well—just in case you need all three.

Back to top

SideDeal

  • Best Sellers
  • New Arrivals
  • Clearance

Account

  • Sign in withEmail
  • Sign in withApple
  • Sign in withFacebook
  • By continuing, you agree to our terms of use and privacy policy.

Help

  • Frequently Asked Questions
  • Support
  • Warranty & Returns
  • Affiliates

Reviews

  1. 2-Pack: Mr. Christmas Indoor/Outdoor 2-Foot Blow Mold Candles
    ★ ★ ★ ★ ★
    Love these.

    Really pretty on the porch. Durable, very sweet flickering warm glow. I purchased 4 of them so that they can down all the porch steps, I love that it runs on battery so I don’t have cords running down the steps. Has solid on button or timer setup. I’ll probably keep these under cover on the porch since the gold base has a glittery texture. Really happy with these blow molds.

  2. 4-Pack: Rockport Martini Theme Mens Crew Socks
    ★ ★ ★ ★ ★
    Comfy and they fit my style

    Great pair of work socks!

  3. Instant Regret Kit
    ★ ★ ★ ★ ★
    Enough good to warrant the buy

    Fun to see what you get. Clothes should not be in it because it is disheartening to get pants too small for any one you know! The rest of the box was generic enough and worth it.

See more reviews → BBB Logo

Membership

$5.99/month membership gets you free shipping on these sites:

  •  
  •  
  •  
  •  
  •  

Social Media

Copyright © 2025 SideDeal. All rights reserved. Privacy Policy | Terms of Use