---
product_id: 66538833
title: "SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9\""
brand: "saferest"
price: "¥25318"
currency: JPY
in_stock: true
reviews_count: 5
category: "Safe Rest"
url: https://www.desertcart.jp/products/66538833-saferest-twin-extra-long-xl-size-premium-waterproof-lab-certified
store_origin: JP
region: Japan
---

# Waterproof membrane backing Exclusive micro-zipper tech 360° bed bug & allergen proof seal SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9"

**Brand:** saferest
**Price:** ¥25318
**Availability:** ✅ In Stock

## Summary

> 🛏️ Sleep Tight, Bug-Free & Bright!

## Quick Answers

- **What is this?** SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" by saferest
- **How much does it cost?** ¥25318 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/66538833-saferest-twin-extra-long-xl-size-premium-waterproof-lab-certified)

## 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

- • **Micro-Zipper Mastery:** Patented zipper design with velcro flap ensures zero gaps—ultimate defense against critters.
- • **Asthma & Allergy Armor:** Breathable, hypoallergenic polyester with a waterproof membrane shields you from dust mites and fluids.
- • **Total Bed Bug Lockdown:** Lab-certified 6-sided encasement traps and blocks all bed bug stages—no escape, no entry.
- • **Effortless Hygiene Upgrade:** Machine washable and FDA-registered medical device for continuous clean, no hassle maintenance.
- • **Durability Meets Discretion:** Soft, rustle-free fabric extends mattress life while keeping your bedroom vibe serene and stylish.

## Overview

SafeRest Twin XL Box Spring Encasement offers lab-tested, 360° protection against bed bugs, dust mites, and fluids with a durable polyester surface and waterproof membrane. Featuring exclusive micro-zipper technology secured by a velcro flap, it guarantees no bug entry or escape. Machine washable and hypoallergenic, this encasement is FDA-registered as a Class 1 medical device, combining health benefits with long-lasting durability for a cleaner, safer sleep environment.

## Description

saferest box spring encasements protect your box spring against bed bugs, fluids and allergens through extensive research and development, saferest has created a better way to protect your box spring from bed bug infestations while at the same time providing real health benefits for those who suffer from daily allergy and asthma triggers full protection for your box springrather than disposing of expensive unprotected mattress sets, saferest encasements seal and safeguard your box spring against potential bed bugs specifically designed and lab tested for bed bugs and allergy protectionsaferest box spring encasements, with a soft polyester surface material and waterproof membrane back coating, were specifically designed and lab tested for bed bug and allergy protection harnessing cutting edge micro-zippers along with breathable bed bug and dust mite proof materials. saferest's exclusive 360° secure micro zipper saferest's patented 360° secure feature offers the ultimate in protection against bed bugs by eliminating the risk that the end zipper traveler will pull back exposing the box spring to bed bugs. This is realized by securing the end traveler with a fold-over velcro flap covering it on all sides. Along with this, our exclusive micro-zipper prevents even the smallest bed bug from passing through the zippers teethe. machine washable machine-wash with your sheets using normal household detergents that do not contain bleach. Tumble dry on low heat. Do not iron. saferest box spring encasements contain no vinyl, phthalates, flame retardants or pvcs. To demonstrate saferest's commitment to quality.

Review: liked it
Review: Imagine how horrified I was to move into an apartment after selling my house, only to have bedbugs turn up! The inspector couldn’t find any evidence of infestation other than the live one I found, so we still don’t know if it was the apartment, the movers, or the used moving boxes my Realtor kindly gave me. Nevertheless, part of the protocol for eliminating them is to use full encasements for the mattress and box springs if I don’t want to throw them out. There was no sign of bugs on them, so I went for the encasements. I have a king size bed with the usual split box springs, so I had to buy three encasements altogether. FYI, an eastern king split box spring is equal to two twin extra longs. Just saying. I posted a review for the mattress encasement, which was really more important on a comfort level, but a box encasement is important, too. These are tightly woven, lab tested, and if there are any residual critters, they are trapped inside until they die. MWAHAHAHA!!! Oops! That was evil. But that's how I feel about the bugs. I hope I'm the apex predator here. Oops! Back to business... the biggest issue I had against encasements was getting them installed by myself. I’m just a 50-something short chick. I would have appreciated some tips and tricks included with the package, but I was on my own. I struggled with the first one, but the second one was easier having learned from my mistakes. Certainly in the testing process they tested the best way to put the darn thing on your bed. Right? If not, they should have. Again, the value of this is in the dust, allergen, bug properties. The whole thing is tightly woven fabric to keep the heebie jeebies out. Given how long you will keep your bed, and how long this will extend its life, plus that it doesn’t rustle, crackle, crinkle, etc., it’s worth the price.

## Features

- Independently lab tested and certified bed bug entry, escape and bite proof
- Surrounds the box spring on all 6 sides with a durable high-grade polyester surface material back coated with a water, bed bug and allergen proof membrane layer (great for those with asthma and allergies)
- Exclusive micro-zipper technology prevents all stages of bed bugs from passing through the zippers teeth
- 360° secure zipper feature prevents accidental openings by sealing the end zipper traveler with a velcro flap
- Machine washable (registered with the fda as a class 1 medical device)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004BAPK0K |
| Best Sellers Rank | 127,035 in Baby Products ( See Top 100 in Baby Products ) 407 in Cot Mattress Protection |
| Brand | SafeRest |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (978) |
| Date First Available | 18 Aug. 2012 |
| Item Weight | 1.07 kg |
| Material | Polyester |
| Model Number | SRBSETWINXL9 |
| Product Dimensions | 28.96 x 27.69 x 8.89 cm; 1.07 kg |
| Special Features | Bug Control, Washable, Water Proof |

## Product Details

- **Brand:** SafeRest
- **Colour:** White
- **Fabric Type:** Polyester
- **Size:** Twin XL
- **Special feature:** Bug Control, Washable, Water Proof

## Images

![SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" - Image 1](https://m.media-amazon.com/images/I/415+exR0nXL.jpg)
![SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" - Image 2](https://m.media-amazon.com/images/I/41sKlvb7qaL.jpg)
![SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" - Image 3](https://m.media-amazon.com/images/I/51+w5aBHdPL.jpg)
![SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" - Image 4](https://m.media-amazon.com/images/I/511ZRcBhu0L.jpg)
![SafeRest Twin Extra Long (Xl) Size Premium Waterproof Lab Certified Bed Bug Proof Zippered Box Spring Encasement - Designed For Complete Bed Bug, Dust Mite And Fluid Protection 9" - Image 5](https://m.media-amazon.com/images/I/514sPJmgrRL.jpg)

## Questions & Answers

**Q: What are the dimensions of the cover?**
A: Twin Size Box Spring Encasement	38" x 75" x 9"		Twin XL Size Box Spring Encasement	38" x 80" x 9"	Full Size Box Spring Encasement	54" x 75" x 9"	Full XL Size Box Spring Encasement	54" x 80" x 9"		Queen Size Box Spring Encasement	60" x 80" x 9"King Size Box Spring Encasement	2 38" x 80" Cal King Size Box Spring Encasement	2 36" x 84" encasements

**Q: Is the entire cover (all 6 sides) waterproof? or just the top?**
A: The encasement is fully waterproof on all 6-sides.  Hope this helps.

**Q: Would this work on a low profile queen split box**
A: If you have a low profile box spring make sure to order a low profile size. I ordered the regular box spring size encasement and it was way to saggy.

**Q: Would this cover be baggy on a full mattress?**
A: As long as you order the Full Size mattress cover it should fit fine.  I have ordered both Queen and King sizes and they have both fit perfectly.  Good Luck!

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by A***R on 14 September 2022*

liked it

### ⭐⭐⭐⭐⭐ Review
*by S***T on 28 March 2020*

Imagine how horrified I was to move into an apartment after selling my house, only to have bedbugs turn up! The inspector couldn’t find any evidence of infestation other than the live one I found, so we still don’t know if it was the apartment, the movers, or the used moving boxes my Realtor kindly gave me. Nevertheless, part of the protocol for eliminating them is to use full encasements for the mattress and box springs if I don’t want to throw them out. There was no sign of bugs on them, so I went for the encasements. I have a king size bed with the usual split box springs, so I had to buy three encasements altogether. FYI, an eastern king split box spring is equal to two twin extra longs. Just saying. I posted a review for the mattress encasement, which was really more important on a comfort level, but a box encasement is important, too. These are tightly woven, lab tested, and if there are any residual critters, they are trapped inside until they die. MWAHAHAHA!!! Oops! That was evil. But that's how I feel about the bugs. I hope I'm the apex predator here. Oops! Back to business... the biggest issue I had against encasements was getting them installed by myself. I’m just a 50-something short chick. I would have appreciated some tips and tricks included with the package, but I was on my own. I struggled with the first one, but the second one was easier having learned from my mistakes. Certainly in the testing process they tested the best way to put the darn thing on your bed. Right? If not, they should have. Again, the value of this is in the dust, allergen, bug properties. The whole thing is tightly woven fabric to keep the heebie jeebies out. Given how long you will keep your bed, and how long this will extend its life, plus that it doesn’t rustle, crackle, crinkle, etc., it’s worth the price.

### ⭐⭐⭐⭐⭐ Review
*by L***E on 26 April 2023*

Firstly, I don't have an issue with bedbugs, so I can't review this product for that. However, I do have a cat and a small dog (pug) who decided to take up residence inside of one of my twin XL box springs (I have a king size bed with two twin XL box springs). They ripped a hole in the underside fabric covering of my box spring and started having parties in there (to which I was rudely not invited, might I add). I tried everything to get them to stop because they were damaging my bed, including using a cheap fitted sheet upside down to cover the bottom of the boxspring, but nothing worked. I found this product and figured it was worth a try. It got here fast. My partner helped move our king size mattress so we could put these on and it took about 5 minutes total. The zippers made it super easy to install. They cover the twin XL boxsprings perfectly without a ton of loose fabric. It's been a few weeks and they've held up to my destructive pets really well. They can't easily claw/pick/dig at the fabric so they quickly lost interest. Highly recommend if you have issues with pets getting into your box springs!

## Frequently Bought Together

- SafeRest Premium 9" Thick Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - TwinXL
- SafeRest 100% Waterproof Twin XL Size Mattress Protector - College Dorm Size for Back to School - Machine Washable Cotton Mattress Cover for Bed - Perfect Bedding Airbnb Essentials for Hosts
- SafeRest Zippered Mattress Protector - Premium 9-12 Inch Waterproof Mattress Cover for Bed - Breathable & Noiseless Washable Mattress Encasement - Twin XL

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/66538833-saferest-twin-extra-long-xl-size-premium-waterproof-lab-certified](https://www.desertcart.jp/products/66538833-saferest-twin-extra-long-xl-size-premium-waterproof-lab-certified)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-29*