---
product_id: 4628825
title: "SafeRest Premium King 9\" Thick Split Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9\" - Split King"
brand: "saferest"
price: "£35.47"
currency: GBP
in_stock: true
reviews_count: 8
category: "Safe Rest"
url: https://www.desertcart.co.uk/products/4628825-saferest-premium-king-9-thick-split-box-spring-encasement-waterproof
store_origin: GB
region: United Kingdom
---

# 100% Waterproof barrier 360° Secure Micro-Zipper Breathable, Vinyl-Free polyester SafeRest Premium King 9" Thick Split Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - Split King

**Brand:** saferest
**Price:** £35.47
**Availability:** ✅ In Stock

## Summary

> 🔒 Lock in protection, unlock peace of mind.

## Quick Answers

- **What is this?** SafeRest Premium King 9" Thick Split Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - Split King by saferest
- **How much does it cost?** £35.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/4628825-saferest-premium-king-9-thick-split-box-spring-encasement-waterproof)

## Best For

- saferest enthusiasts

## Why This Product

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

## Key Features

- • **Ultimate Liquid Defense:** Protect your investment with a fully waterproof, high-grade polyester shield that keeps your box spring pristine.
- • **Effortless Care & Durability:** Machine washable and tumble dry safe, designed to maintain peak performance wash after wash.
- • **Fits Perfectly Up to 9" Thick:** Tailored to snugly encase split king box springs up to 9 inches thick for seamless protection.
- • **Breathable & Vinyl-Free Comfort:** Enjoy noiseless, eco-friendly protection without the plastic smell or crinkle, crafted for modern wellness.
- • **360° Secure Micro-Zipper Technology:** Exclusive zipper design with Velcro flap ensures zero accidental openings—sleep worry-free every night.

## Overview

The SafeRest Premium King 9" Thick Split Box Spring Encasement offers comprehensive 6-sided protection with a durable, waterproof polyester surface and patented 360° Secure Micro-Zipper technology. Designed to fit split king box springs up to 9 inches thick, it is breathable, noiseless, and free from vinyl, phthalates, and harmful chemicals. Easy to maintain with machine wash and tumble dry compatibility, it safeguards your box spring from fluids and damage while enhancing sleep hygiene.

## Description

SafeRest Box Spring Encasements Protect Your Box Spring Against Fluids Through extensive research and development, SafeRest has created a better way to protect your box spring Full Protection For Your Box SpringRather than disposing of expensive unprotected mattress sets, SafeRest encasements seal and safeguard your box spring.Specifically Designed and Lab Tested SafeRest box spring encasements, with a soft polyester surface material and waterproof membrane back coating, were specifically designed and lab tested to protect your mattressSafeRest's Exclusive 360° Secure Micro Zipper SafeRest's patented 360° Secure feature offers the ultimate in protection eliminating the risk that the end zipper traveler will pull back exposing the box spring. This is realized by securing the end traveler with a fold-over Velcro flap covering it on all sides. Machine-wash with your sheets, tumble dry on low heat. Do not iron.SafeRest box spring encasements contain no vinyl, phthalates, flame retardants or PVCs.

Review: Encasement made easy, laundered easily, matter and zipper design impressive, impressive! - A really quality item - had never seen one before! My husband and I were able to get it on the box springs and zipped up I washed and dried it according to directions and came out of dryer soft, not wrinkled Very impressed with the material Our box springs fit fine and am impressed with the zipper design It’s nice to have the box springs zipped up and completely covered in clean cover After having this we will always use the encasement - totally covered box springs Am Confident in this purchase!
Review: ... Is keeping our cat from clawing our new box spring - This is an excellent product, even better than I was expecting. The zipper encompasses three of the four edges so that the "encasement" is extremely easy to put on -- and take off, should you want to. The zipper is also "tight," so much so that it's pretty much invisible once it's closed (preventing virtually anything, even very tiny things, from getting to your box spring). I bought this for the new box spring/foundation we've had, as I write, for barely two weeks. We bought the box spring and this encasement, along with a new mattress, for our home bed where bedbugs and other such creatures are not a problem. Instead, I got it in hopes that one of our cats -- who daily was using several corners of our previous nine-year-old box spring as a scratching post -- would stay away from this new box spring due to the VERY tight weave of this encasement. It's working. Roo was, from day 1, far less interested in it, and after systematically redirecting her away from it (she certainly knows what "NO!" means) she is now, instead, using the actual scratching post that's in the bedroom, as our other cats do. Roo is likely not very interested because she can't actually tear the encasement fabric or stick her claws into it in the (to her) same satisfying way she could into the previous box spring. If her claws were very sharp (we keep them trimmed) they might leave pin-point punctures the fabric (she's a small cat, with small claws), but this encasement's fabric is just not tearable. By extension, this encasement must certainly also work to keep out bedbugs, et al, as it's intended. Considering the unusual fabric and zipper, how well this is made, and how much good bedding materials cost these days, the price, I think, is also pretty reasonable.

## Features

- Surrounds the box spring on all 6 sides with a durable high-grade polyester surface material
- Exclusive Micro-Zipper technology.
- 360 Secure zipper feature prevents accidental openings by sealing the end zipper traveler with a Velcro flap
- Polyester
- WATERPROOF - Don't worry about your box spring getting ruined. Our box spring encasement protects agains liquids

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00H7KZ5K6 |
| Age Range Description | Adult, Child |
| Best Sellers Rank | #182,668 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #85 in Mattress Encasements |
| Brand | SafeRest |
| Brand Name | SafeRest |
| Closure Type | Zipper |
| Color | White |
| Customer Reviews | 4.7 out of 5 stars 9,023 Reviews |
| Fabric Type | Polyester |
| Manufacturer | SafeRest |
| Manufacturer Part Number | B00H7KZ5K6 |
| Material Type | Polyester |
| Model Number | SYNCHKG035727 |
| Other Special Features of the Product | Durable,Waterproof |
| Product Care Instructions | Machine Wash |
| Size | King |
| Special Feature | Durable,Waterproof |
| UPC | 632963362736 850012287384 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** SafeRest
- **Color:** White
- **Size:** King
- **Fabric Type:** Polyester
- **Special Feature:** Durable,Waterproof

## Images

![SafeRest Premium King 9" Thick Split Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - Split King - Image 1](https://m.media-amazon.com/images/I/71DOWYNVKKL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Encasement made easy, laundered easily, matter and zipper design impressive, impressive!
*by S***A on January 16, 2026*

A really quality item - had never seen one before! My husband and I were able to get it on the box springs and zipped up I washed and dried it according to directions and came out of dryer soft, not wrinkled Very impressed with the material Our box springs fit fine and am impressed with the zipper design It’s nice to have the box springs zipped up and completely covered in clean cover After having this we will always use the encasement - totally covered box springs Am Confident in this purchase!

### ⭐⭐⭐⭐⭐ ... Is keeping our cat from clawing our new box spring
*by M***N on March 28, 2015*

This is an excellent product, even better than I was expecting. The zipper encompasses three of the four edges so that the "encasement" is extremely easy to put on -- and take off, should you want to. The zipper is also "tight," so much so that it's pretty much invisible once it's closed (preventing virtually anything, even very tiny things, from getting to your box spring). I bought this for the new box spring/foundation we've had, as I write, for barely two weeks. We bought the box spring and this encasement, along with a new mattress, for our home bed where bedbugs and other such creatures are not a problem. Instead, I got it in hopes that one of our cats -- who daily was using several corners of our previous nine-year-old box spring as a scratching post -- would stay away from this new box spring due to the VERY tight weave of this encasement. It's working. Roo was, from day 1, far less interested in it, and after systematically redirecting her away from it (she certainly knows what "NO!" means) she is now, instead, using the actual scratching post that's in the bedroom, as our other cats do. Roo is likely not very interested because she can't actually tear the encasement fabric or stick her claws into it in the (to her) same satisfying way she could into the previous box spring. If her claws were very sharp (we keep them trimmed) they might leave pin-point punctures the fabric (she's a small cat, with small claws), but this encasement's fabric is just not tearable. By extension, this encasement must certainly also work to keep out bedbugs, et al, as it's intended. Considering the unusual fabric and zipper, how well this is made, and how much good bedding materials cost these days, the price, I think, is also pretty reasonable.

### ⭐⭐⭐⭐⭐ Very Good Quality
*by L***R on May 23, 2015*

I installed this encasement on my box springs, along with the SafeRest mattress encasement, as a preventative measure and deterrent*, so I can't speak directly to how well these keep bed bugs in or out. What I can say is the quality is far superior to the original box spring encasement I purchased (no names, comes in orange packaging). That one was much more cheap and 'plastic-y' feeling and got brittle pretty quickly, which is a problem you don't want to have with an encasement. The SafeRest zipper is very tight and gave me no problems, and the Velcro closure at the end is a good added measure. I did take the measures of softening the metal edges of my bed frame with duct tape to prevent tears and duct taped the corners of the encasement to stop my cats from scratching it, my bed skirt covers that up. The quality seems very good, no tearing, flexible, soft and durable material. Opens on three sides to install, which I did no my own. I just cleaned my floors well, laid the encasement down and open, placed the box spring on top, flipped the top over and zipped it up. Don't try to put the encasement on with the box spring standing on edge or on end if you're doing it alone, it will be an exercise in futility. I work at a college and, because of the dorms, we've been educated about bed bugs. Because of this I might be a bit more cautious than many, but with bed bugs on the rise, I think these are a generally good idea --- especially in urban areas where your'e sharing cabs, trains and buses with the public. Anyone can bring them into a home, bed bugs don't care where you live or how much money you make. While the numbers are still on the human side (I believe something like 20% of households in the US either have had bed bugs or know someone first hand who has had bed bugs), once they're in your home the odds flip, so some forethought can be a good thing. *As with all encasements, you should know that these won't repel bed bugs, it will just prevent them from taking up residence in their favorite place, which is your bed and, most commonly, your box springs.

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-20*