---
product_id: 13276292
title: "UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support"
brand: "ultrablock"
price: "€ 61.16"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.hr/products/13276292-ultrablock-waterproof-mattress-cover-twin-xl-white-breathable-noiseless-deep
store_origin: HR
region: Croatia
---

# 100% Waterproof Breathable Tech Fits 18" Mattresses UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support

**Brand:** ultrablock
**Price:** € 61.16
**Availability:** ❌ Out of Stock

## Summary

> 🛌 Sleep Smart, Live Well!

## Quick Answers

- **What is this?** UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support by ultrablock
- **How much does it cost?** € 61.16 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/13276292-ultrablock-waterproof-mattress-cover-twin-xl-white-breathable-noiseless-deep)

## Best For

- ultrablock enthusiasts

## Why This Product

- Trusted ultrablock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **No More Noises:** Enjoy a noiseless experience with no crinkling sounds—just pure tranquility.
- • **Allergy-Free Zone:** Hypoallergenic materials eliminate dust mites and allergens for a healthier sleep.
- • **Sleep Like a Baby:** Experience unparalleled comfort with a soft top surface that wicks away moisture.
- • **Ultimate Protection:** Passes the 100-gallon flood test—your mattress is safe from spills and accidents.
- • **Easy Care Convenience:** Machine washable with a fitted sheet style cover that stays securely in place.

## Overview

The UltraBlock Waterproof Mattress Cover is a Twin XL protector designed with advanced technology to keep your mattress safe from spills, allergens, and moisture. Its breathable, noiseless surface ensures a comfortable sleep experience, while the deep pockets fit mattresses up to 18 inches thick. Hypoallergenic and machine washable, this cover is the ultimate solution for a worry-free night's sleep.

## Description

Buy UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support: Mattress Protectors - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Seems good, but not slip proof. (updated) - I haven't needed to check the water proofing, and don't know how well the dust mite protection works, but this seems to be a decent mattress cover for the money. It is comfortable on my Sleep Number twin XL, and is not too hot. The only complaints I have are: 1) Washing per the instructions is a bit of a pain, and takes a while before everything is dry. Ultrablock recommends washing before first use. After this inital and 1 subsequent washing, per Ultrablock's recommended schedule, the soft flannel-like side is starting to look like it is degrading, trying to 'pill' in the center of the cover. Doesn't feel uncomfortable, just not sure how long it will last. 2) Even when first put on the bed, it seems to fit a bit less than snug, and by the end of a week it sometimes bunches up under the sheet. I have thought of using some soft-clip sheet tensioner straps to hold it tighter from side to side, but don't know if the Ultrablock elastic skirt is strong enough for use of these straps. Maybe just a problem for Sleep Number mattresses? (But my fitted twin sheets fit well, so...) At any rate, it seems decent enough - my previous mattress covers were expensive, didn't have these issues - but didn't survive the first washing. Time will tell how well it holds up, and hope I never have to test the rater proof claims! Update: After my review, the manufacturer reached out to me and determined that the original mattress pad was possibly defective. They sent me a new one at no charge. I asked them about using the Jajaplus bed sheet securing straps sold on desertcart to keep the pad taught and prevent wrinkling under the sheet (garter style closures instead of sharp tooth clamps like most sheet straps). They responded that these should work fine without damaging the pad. The new pad arrived within days of our conversation, and the Jajaplus straps have eliminated the problem with crease appearing under the sheet, so everything is great. Re-marked the rating as 5 stars because: 1) The manufacturer follows user comments, showing interest in their qualkity control 2) They had rapid response and resolution of a problem 3) They worked with me on an unusual request about their product (use of sheet straps).
Review: Great for adjustable beds! - My mother suffering from cancer was moved to a health care facility with a hospital style bed. The large pieces of mattress protector pads they used bunched up when the head area was raised on her bed to sit up, making large wrinkles that hurt her fragile back and skin. This pad has the plastic like material on the side for the mattress and a soft material on the side she felt under the sheet, much more pleasant to sit and sleep on. When she adjusted the head or legs, this pad barely bunched up and stayed in place. She loved the difference, much more comfortable during a challenging time. I highly recommend for hospital style beds or adjustable beds.

## Features

- Cotton
- Multipurpose Protection: This twinXL mattress protector provides durable and waterproof protection against bed bugs, accidental spills, mites, and bedwetting to preserve the cushion while preventing stains and exposure to allergens.
- Durable & Safe: The odor-free twinXL mattress cover does not contain PVC's, phthalates, or vinyl. This waterproof mattress protector has also beat the 100 gallon flood test to prove its resilience to liquids and moisture!
- Comfort: The mattress pad not only maintains the quality of the mattress but also provides superior comfort. The soft surface layer is ultra comfortable and, unlike other mattress covers, it is produced to be ultra-quiet and does not crinkle.
- Deep-Fitted Pockets: The twinXL size sheets are designed with strong, tight-fitting elastic corner fitting pockets to ensure that it fits precisely, optimizing protection and comfort. The stretchable skirt fits today’s thicker beds up to 18”.
- Advanced Technology: With a premium waterproof surface and specialized hi-tech backing, this mattress protector (twinXL) will help keep you and your family safe by eliminating dust mites and their allergens while saving the fabric from mold & mildew.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DSCTS9G |
| Age Range Description | Adult |
| Best Sellers Rank | #2,846,110 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1,181 in Mattress Protectors |
| Brand | UltraBlock |
| Brand Name | UltraBlock |
| Closure Type | Pull On |
| Color | White |
| Customer Reviews | 4.4 out of 5 stars 466 Reviews |
| Fabric Type | Cotton |
| Manufacturer | UltraBlock |
| Manufacturer Part Number | 820103328234 |
| Material Type | Soft Plush Top |
| Model Number | COMINHKR052107 |
| Other Special Features of the Product | Water Proof |
| Product Care Instructions | Machine Wash |
| Size | Twin XL |
| Special Feature | Water Proof |
| UPC | 820103328234 |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** UltraBlock
- **Color:** White
- **Fabric Type:** Cotton
- **Size:** Twin XL
- **Special Feature:** Water Proof

## Images

![UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support - Image 1](https://m.media-amazon.com/images/I/81DoREoPkVL.jpg)
![UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support - Image 2](https://m.media-amazon.com/images/I/81w5Qf36toL.jpg)
![UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support - Image 3](https://m.media-amazon.com/images/I/91h26awfMWL.jpg)
![UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support - Image 4](https://m.media-amazon.com/images/I/81Y+nv-nlRL.jpg)
![UltraBlock Waterproof Mattress Cover, Twin XL, White, Breathable, Noiseless, Deep Pockets, Safe Sleeping, Top Tier Tech, Custom Support - Image 5](https://m.media-amazon.com/images/I/81kEClE4uFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Seems good, but not slip proof. (updated)
*by J***T on January 26, 2019*

I haven't needed to check the water proofing, and don't know how well the dust mite protection works, but this seems to be a decent mattress cover for the money. It is comfortable on my Sleep Number twin XL, and is not too hot. The only complaints I have are: 1) Washing per the instructions is a bit of a pain, and takes a while before everything is dry. Ultrablock recommends washing before first use. After this inital and 1 subsequent washing, per Ultrablock's recommended schedule, the soft flannel-like side is starting to look like it is degrading, trying to 'pill' in the center of the cover. Doesn't feel uncomfortable, just not sure how long it will last. 2) Even when first put on the bed, it seems to fit a bit less than snug, and by the end of a week it sometimes bunches up under the sheet. I have thought of using some soft-clip sheet tensioner straps to hold it tighter from side to side, but don't know if the Ultrablock elastic skirt is strong enough for use of these straps. Maybe just a problem for Sleep Number mattresses? (But my fitted twin sheets fit well, so...) At any rate, it seems decent enough - my previous mattress covers were expensive, didn't have these issues - but didn't survive the first washing. Time will tell how well it holds up, and hope I never have to test the rater proof claims! Update: After my review, the manufacturer reached out to me and determined that the original mattress pad was possibly defective. They sent me a new one at no charge. I asked them about using the Jajaplus bed sheet securing straps sold on amazon to keep the pad taught and prevent wrinkling under the sheet (garter style closures instead of sharp tooth clamps like most sheet straps). They responded that these should work fine without damaging the pad. The new pad arrived within days of our conversation, and the Jajaplus straps have eliminated the problem with crease appearing under the sheet, so everything is great. Re-marked the rating as 5 stars because: 1) The manufacturer follows user comments, showing interest in their qualkity control 2) They had rapid response and resolution of a problem 3) They worked with me on an unusual request about their product (use of sheet straps).

### ⭐⭐⭐⭐⭐ Great for adjustable beds!
*by S***C on January 28, 2020*

My mother suffering from cancer was moved to a health care facility with a hospital style bed. The large pieces of mattress protector pads they used bunched up when the head area was raised on her bed to sit up, making large wrinkles that hurt her fragile back and skin. This pad has the plastic like material on the side for the mattress and a soft material on the side she felt under the sheet, much more pleasant to sit and sleep on. When she adjusted the head or legs, this pad barely bunched up and stayed in place. She loved the difference, much more comfortable during a challenging time. I highly recommend for hospital style beds or adjustable beds.

### ⭐⭐⭐⭐ Quality product
*by E***R on April 10, 2021*

Very durable and easy to clean

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**Shop now:** [https://www.desertcart.hr/products/13276292-ultrablock-waterproof-mattress-cover-twin-xl-white-breathable-noiseless-deep](https://www.desertcart.hr/products/13276292-ultrablock-waterproof-mattress-cover-twin-xl-white-breathable-noiseless-deep)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-18*