HOSPITOLOGY PRODUCTS Mattress Encasement - Zippered Bed Bug Dust Mite Proof Hypoallergenic - Sleep Defense System - Twin XL - Waterproof - Stretchable - Standard 12" Depth - 38" W x 80" L
Condition: New
Buy Now, Pay Later
As low as
$9
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Thursday, Jul 23
Material Type: 12" - 18" Depth Mattress
Size: Twin XL
Features
- Knit Polyester
- Zippered mattress cover stretches to fit any Twin XL (38 x 80) standard mattress depth from 12" to 18"
- 100% Waterproof barrier on all six sides of mattress - Lab-tested
- Extra-soft polyester knit fabric is cool and comfortable - breathable waterproof membrane won't trap heat
- Can help improve sleep by reducing common substances that can reach the sleeper and disrupt respiratory function
- Machine washable - Tumble dry low - 5-Year Limited Manufacturers Warranty
Brand: HOSPITOLOGY PRODUCTS
Color: White
Size: Twin XL
Fabric Type: Knit Polyester
Special Feature: Water Proof
Brand Name: HOSPITOLOGY PRODUCTS
Age Range Description: Child
Manufacturer: HOSPITOLOGY
UPC: 855039004020
Manufacturer Part Number: SDSM02TXL
Model Number: SDSM02TXL
Manufacturer Warranty Description: Hospitology Products offers a 5-year Limited Warranty from Date of Purchase. This warranty covers only defects in workmanship or materials. Warranty is limited to products purchased directly from Hospitology Products or an authorized reseller. Purchaser is responsible for all transportation costs. Structural damage caused by abuse, misuse, improper installation, or failure to follow care instructions will void all warranties. Proof of purchase required. To be eligible for warranty, product must be received in good condition. Hospitology Products will not be responsible for any incidental or consequential damage from regular use of its products, and will not be liable for claims in excess of the purchase price of the product. In rare cases, depending on your water quality, washing your encasement may cause some discoloration. This discoloration will not affect the functionality of the encasement, is not covered by the warranty.
Unit Count: 1.0 Count
Item Weight: 2 Pounds
Other Special Features of the Product: Water Proof
Closure Type: Zipper
Water Resistance Level: Waterproof
Fabric Type: Knit Polyester
Product Care Instructions: Machine Wash
Material Type: 12" - 18" Depth Mattress
Thread Count: 2000
Size: Twin XL
Item Display Dimensions: 80 x 38 inches
Color: White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 23
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Material Type: 12" - 18" Depth Mattress
Size: Queen
Amazing cover. I bought a few to keep all my mattresses protected, not from anything in particular, but I liked the idea of a keeping my mattresses pristine. I've had these for at least 3 years, and this past week one my dogs had an accident on the bed. Urine soaked through the flat sheet, the fitted sheet, a mattress pad, and I was so bummed to see the encasement also soaked. HOWEVER, when I removed it from the mattress, the mattress was as clean as ever! I was so elated. Certainly an excellent buy for $40 to protect an expensive mattress. I know waterproofness can wear in the wash and depend on the accident itself, so I'll specify that I've washed and dried the encasement as directed just once when I received it, the volume of liquid was pretty significant (likely the full bladder of a 60lb dog), and the accident was discovered within 20 mins or so, so it wasn't sitting for an extended duration (like overnight). The encasement is a pretty good fit and doesn't slip around. Its not something I even notice is on the bed. Its as though it isn't there at all, so its as comfortable as my bed. It is not thick, in terms of being plush, which is perfect. Great buy! Would recommend.
...
show more
Reviewed in the United States on December 21, 2025 by Rando
Material Type: 9" - 11" Depth Mattress
Size: King
Fits well, easy to put on. Looks like a good deal for the money.
Reviewed in the United States on February 27, 2026 by Safety Engineer
I left this feedback for all the items I purchased and listed here in prevention of BED BUGS. I live in a apartment building. 10 years ago in the city I live in I never heard any mention of bedbugs. Now I hear it everywhere. I purchased the following just as a precaution. Hospitology Sleep Defense System Waterproof/Dust Mite Proof Pillow Encasement, Standard, Set of 2 Hospitology Sleep Defense System Waterproof/Bed Bug Proof Mattress Encasement,80-Inch by 60-Inch, Queen Hospitology Sleep Defense System Bed Bug Proof Box Spring Encasement, 80-Inch by 60-Inch, Queen BEAP 10013 4-Pack Detector Bed Bug Coaster Trap Diatomaceous Earth Food Grade Pest Pistol Mineral Oil I read online many, many, many different suggesting and opinions. These are most popular ideas, and I agree with them. My bed is brand new and I wanted some protection. Every thing listed I purchased on Amazon is good quality and no complaints. I was very nervous the Hospitality Sleep Defense items would have a plastic feel, but it is not the case. The Hospitality Sleep Defense for the pillows and bed have a nice soft and smooth feel to them. They make my bed and pillows feel smoother and softer. They are a good quality and feel like they will last a long time and not rip. They are very big for even the biggest of mattresses or box springs. First of all the Diatomaceous Earth Food Grade box i received is big. I used this for my entire apartment and still have more then half left in the box. Using Diatomaceous Earth Food Grade, and Pest Pistol (online comments are you can also use empty plastic ketchup and mustard bottles) I dusted all long the walls under the carpet (use a dollar store paintbrush to keep it nice and neat), and in some places I lifted the carpet up and sprayed a little on the carpet tacs that hold the carpet in place. You do not have to spray it heavy, only a light coating. Then I took the electrical cover panels and sprayed inside the walls, USE CAUTION, TURN OFF THE ELECTRICAL PANEL SUPPLY. You might want to consider wearing a dollar store face mask, the Diatomaceous Earth Food Grade will blow around a little, if you get carried away with it. Make sure you spray into all holes and crevasses (even in the bathroom) behind the medicine cabinet if there are gaps, in the trimming along the walls, closets, everywhere!!! Every room, every space!!!!!!!. Online reports and comments are that bed bug like hiding behind the medicine cabinet in the bathroom, behind mirrors or photos hanging on walls, dressers, dressers drawers, light shades. I even sprayed a little on my bed frame. Keep in mind, if the Diatomaceous Earth Food Grade gets wet, it is useless and you will have to reapply it. Also note, if you shampoo your rugs a couple times a year, like me, you may have to reapply Diatomaceous Earth Food Grade after your rugs dry. Diatomaceous Earth Food Grade kills all kinds of bugs, cutting into their hard shell bodies and sticks into their joints. This definitely gives me peace of mind when I sleep or laying in my bed during the day. Bed bugs usually feed in the middle of the night, but if they get hungry they will come out all times of the day. Isolate your bed from the walls and the floors. Only have the legs of your bed touching the floor. Keep blankets from touching the walls and floor. Nothing should be touching your walls or floor. ISOLATION! Computer power cords and cell phone cords should not be on your bed when you sleep. Although there are online reports of bedbugs climbing up to the ceiling and falling down/jumping onto beds, I am not that paranoid. Because it is a death sentence for them, they cannot escape or live in the mattress or lay eggs in the mattress because of the Hospitality Sleep Defense. Always make sure you wash and dry your blankets and sheets every week. Dry for at least 20-30 minutes on hot. BEAP 10013 4-Pack Detector Bed Bug Coaster Trap are very strong and very big. I was very surprised! I was nervous, I have a QUEEN size bed with wheels under each leg. But they fit with room to spare. Use the Mineral Oil in the outer trench of the Coasters. Bed Bugs cannot swim in it, they sink to the bottom and drowns them. But dummy me, my queen bed frame has 5 legs, one leg to support the middle of the bed. I used them on my sofa also. Good luck if you find yourself with bedbugs or using these as a prevention and defense. If you do not have the time or energy, you can hire an exterminator which will cost thousands and thousands of dollars. I am the type of person I do not like to use pesticides in my apartment unless I have to. I never use those insect fumigators, they spray pesticides everywhere and you will eventually absorb them into your skin, from the floors and furniture. If you already have bed bugs, I suggest vacuuming every inch of your bed, on your bed, box, and frame head board. Then do your furniture, sofa and recliners. Sofas, couches and recliners are much harder to eradicate bedbugs from, you might want to think about trashing it. Please, before you trash your furniture, damage your furniture so no one else takes it and gets a bedbug nightmare. When you are finished vacuuming, remove the bag, put in a plastic trash bag and TAPE IT SHUT and put outside away from your house in a trash can. They start spraying the Diatomaceous Earth Food Grade everywhere. Bed Bugs are smart creatures, they are very good at hiding until they are hungry. And they will search you out like a blood hound dog. Good luck!
...
show more
Reviewed in the United States on August 29, 2014 by R. Griffin
Material Type: 6" - 8" Depth Mattress
Size: Twin
I am impressed with the design of this item! I was not expecting it to be as nice as it is . The material is so much better than any of the others I've purchased in the past. This is well worth the fue extra dollars it is and the zipper tie holder is very well made and I will definitely order another one for my next mattress I get soon.
...
show more
Reviewed in the United States on March 2, 2026 by Mary Hampton
Material Type: 12" - 18" Depth Mattress
Size: Full XL
I looked through many reviews of bed bug mattress covers before settling on this Hospitology one. I was waiting to write my review because I wasn't sure if bed bugs were the exact source of my problem or maybe there was a flea issue too. I started getting a lot of random bites, especially in the mornings for a few weeks. At first, I thought it was a flea issue, but my dog is usually outdoors. We did see some fleas on him so I gave him some Frontline, combed out that crap, and even rubbed him with some diatomaceous earth. I also DE-ed the backyard in places where he slept a lot. Washed all my sheets, pillow covers, blankets, and vacuumed the crap out of my room, even behind my headboard. Still getting bitten. DE placed under the mattress on top of the wooden planks above the drawers under my bed. Still getting bitten. Strangely, my bf wasn't affected. And I started wondering because these bites weren't exactly like flea bites and they itched SO badly and swelled up wayyy more. Then I actually saw the little buggers and their exoskeletons tucked in the second mattress cover thing (yes, I have two covers) I had missed washing the first time. There were not many, but they were all on MY side of the bed, so no wonder my bf wasn't getting bitten! DISGUSTING! Washed everything again, then went to research bed bugs some more. I have no idea where they hitched a ride from but that's when I knew it wasn't the fleas. I read that you needed to buy a bed bug proof entire mattress enclosure case and Amazon led me to this product!! It has been almost a month now since I put on my mattress encasement and I have not had a new bite since then. I'm still sometimes itching from the old bites, but they are slowly recovering! This case has very breathable non-plasticy material and it's not crinkly either. It even velcroes over the zipper end so the bed bugs can't come out. I plan to leave it on for...ever. The price is very affordable for fantastic quality, and I think I'm going to want one for every bed I buy in the future too! The only reason I didn't give them a full 5 stars is because I have a full size bed right now and they only had Full-Size XL available on Amazon. I tried asking a Q on Amazon to see if they were going to stock Full-Size encasements soon, but no one answered me =( They have it listed on their actual website, but I couldn't see it being sold! I finally couldn't wait anymore because I kept getting bitten, so I just went ahead and ordered the Full XL cover. I just tucked the extra bit of mattress underneath at one end and pulled my other mattress covers over the encasement. It's working fine. But would have been nice to have a better fitting case! *UPDATE* I guess they do have a Full Size cover now!! I couldn't wait for it, but good to know they have it. But at least now you know that even if it's slightly too big, the case still works, and I'm definitely keeping mine on!!
...
show more
Reviewed in the United States on August 28, 2014 by Jasmine