Best Twin Extra Long Mattress Encasements in 2026

WATERPROOF - Big spill? No big deal. The soft terry cotton material on this waterproof mattress protector wicks up even the biggest accidents or stains without any leakage.

ZIPPER GUARD - No holes here, folks. Our twin XL mattress cover comes with a well-designed zipper to make sure your bed is covered from every angle for protection from unwanted creepy crawlies.

BREATHABLE - Our cooling mattress protector is super soft, super secure, and super soothing. No more sweaty summer nights - this cover will keep you cool!

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

FITS PERFECTLY 12 INCHES OF HEIGHT : Premium quality Six – Sided Mattress Protector designed to fit Twin XL size mattress having dimensions of 39 inches by 80 inches; 12 inches deep pocket.

EFFECTIVE WATERPROOF : Mattress encasement protects your mattress from all kinds of liquids, bed wetting and stains. High quality TPU backing on all sides resist any leakage into the mattress.

HIGH QUALITY FABRIC : The high- end smooth knitted fabric ensures comfortable feel along with breathability as it doesn’t trap heat. The soft and quiet encasement becomes your ultimate choice.

Covers All Six Sides - Keep your mattress clean, dry, and spotless on all sides. This waterproof mattress protector helps shield your cushion against dust, moisture, dirt, stains, or small critters.

A Snug, Secure Fit - Don't worry about this mattress cover getting removed on its own while you sleep. This is a zippered mattress protector, with the smooth zip closure hidden under a discreet flap.

Deep & Restful Sleep - Have you had it with bed covers that keep making scratchy noises whenever you move? Our bed protector is made of terry fabric that stays noiseless even while you toss and turn.

MATTRESS ENCASEMENT - Fits Twin XL size mattress perfectly with dimensions 39 inches by 80 inches; 13 inches deep pocket

KNITTED POLYESTER FABRIC - Stretchable knitted polyester fabric fits the mattress easily and gives a comfortable feel while you sleep

ZIPPERED COVER - Zippered cover with zip secures the mattress from 360 degrees; it protects the mattress

TOTAL PROTECTION: This mattress encasement keeps your mattress surface safe and fresh with 360˚ protection. Ultra-thin, flexible fabric stays secured in place and fits up to 9” mattresses

AQUA TIGHT BARRIER: 100% waterproof mattress cover safeguards your mattress against liquids, spills, and accidents—keeping you dry and comfortable while also avoiding stains and messes

QUIET COMFORT: Sleep comfortably with this breathable bed protector. Lightweight fabric is noiseless, allowing a peaceful night’s sleep that won’t change the feel of your mattress

100% Waterproof - Six-sided premium mattress protector blocks perspiration, bed wetting, liquids and stains; 10-year quality guarantee (NOTE: For frequent accidents and easy clean-ups, place a fitted SureGuard Mattress Protector over the encasement).

Bed Bug Proof - Super fine zipper with Invisi-Zip and SureSeal technology completely seals off the mattress from bed bugs - use with a SureGuard Box Spring Encasement

Keeps Your Mattress Clean & Fresh - Blocks dust, dirt and dander on all sides.

Encases the mattress for complete protection from bed bugs, allergens, liquids and stains

Deep pocket design accommodates mattresses 6 to 18 inches deep - bottom elastic creates a smooth, secure fit

Thin, hypoallergenic fabric is quiet, smooth and breathable and will not change the feel of your mattress

100% Waterproof Protection: Bedsure 100% waterproof mattress encasement protects against from accidental spills, stains and moisture to keep your luxury mattress clean - Shield a impermeable TPU mattress cover to block all liquids from penetrating your expensive mattress, perfect for sweaty sleepers, parents who have young children and people who eat or drink in bed - Prevent bad smell in damp to improve your sleep quality and comfort than mattress pad, cover and protector.

Magnificent Protection: Mattress encasement entirely encases and seals your fabulous mattress and box spring to safeguard your family - Apply effective and efficient treatment to detect dirt to protect your new mattress and box spring - Install our protector to save your mattress for longer years to use.

Excellent Featured Design: Twin Extra Long encasement measured by 39" x 80" fits any mattress effortlessly from 9" to 12" to give a smooth appearance - Unlike 5-sided fitted sheet mattress pad, cover or protector, 6-sided zippered mattress encasement encloses your mattress completely - The secure end stop zipper with a foam pad cover upgrades the security level of protection - 100% lightweight polyester microfiber ensures installment easily by one person.

Fit great: Fits twin xl size mattress perfectly with dimensions 39 inches by 80 inches; 8-11 inches deep pocket.

High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress encasement, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped for a long time.

Waterproof and breathable: Not only the top surface is waterproof like other zippered encasement, the 4 sides and the bottom of this zipped mattress protector are waterproof, which can keep any liquid from leaking into your mattress.

【High Quality Fabric】The high-end smooth knitted fabric is soft and breathable,protects your expensive mattress on six sides.

【Zipper Fixation】The mini zipper with velcro zipper protector can be stretched and fixed 360 degrees.The mattress cover can be firmly fixed on the mattress.

【Effective Waterproof】The six sides are laminated with TPU film to ensure that all kinds of liquids cannot enter the mattress.Don't worry about accidental leakage.It is very suitable for families with children,incontinent persons,pregnant women and women during menstruation.

Fit great: Fits twin xl size mattress perfectly with dimensions 39 inches by 80 inches; 11-14 inches deep pocket.

High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress encasement, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped for a long time.

Waterproof and breathable: Not only the top surface is waterproof like other zippered encasement, the 4 sides and the bottom of this zipped mattress protector are waterproof, which can keep any liquid from leaking into your mattress.

Box spring cover is independently lab-tested

Stretchable 100% polyester knit fabric makes installation a breeze – includes Installation Kit

Twin XL size (38” x 80”) fits box spring depths of 9"- 11"

100% Waterproof - Six-sided premium protection against everyday liquids and stains; 10-year quality guarantee

Bed Bug Proof - Super fine zipper with Invisi-Zip and SureSeal technology completely seals off the box spring from bed bugs - use with a SureGuard Mattress Encasement

Hypoallergenic - Keeps Your Box Spring Clean & Fresh - Blocks dust mites, mold, mildew, pollen and pet dander on all sides.

Fit great: Fits Twin size mattress perfectly with dimensions 39 inches by 75 inches; 8-10 inches deep pocket.

6 Sides Fully Encased: Waterproof material backing on all sides resist any leakage into the mattress, blocks perspiration, bed wetting, liquids and stains.

High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress encasement, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped for a long time.

BED BUG PROOF PROTECTOR: With a six-sided design, our dust mite mattress cover fully encases your mattress, ensuring comprehensive protection. The premium zipper, along with the Velcro flap, provides dual defense against bed bugs and dust mites, keeping them away from your bed.

100% WATERPROOF PROTECTION: Fused with an advanced water-resistant, yet breathable TPU membrane. Our waterproof mattress protector acts as a barrier to keep damp messes or accidents from actually coming in contact with your mattress.

3M SCOTCHGARD STAIN RELEASE TECHNOLOGY – Besides providing a barrier to water and tiny particles, this bed bug cover also provides a protective barrier to your expensive mattress; therefore, decreasing the normal wear and tear while increasing longevity.

Premium Sleep Mattress Protector: Adopting from Premium Bamboo Rayon Fabric, making you sleeping like a cloud. Protecting your expensive mattress from stain and other damage. Also, it could refresh your old mattress topper to brand new with less expense. Easy to maintain and you could wash it by washing machine.

Bamboo Covers for Various Size Mattress Topper: To meet the difference needs, we provide 6 sizes for different shape mattress topper: Twin (39” X 75”), Twin XL (38” X 80”), Full (54” X 75”), Queen(60” X 80”), King(76” X 80”), CK ( 72” X 84”), you could choose the most suit size for yourself.

Suitable for all age: Subrtex mattress topper cover is designed for kids, toddlers, pets, and so on. Certified with Oeko-Tex, No Stimulation, No Pollution. We promise all material environmental health.

EVEREST POLYZIP Mattress/ Box Spring Encasement 100% Stretch Knitted Polyester Micro Filament Fabric. Not Vinyl, Plastic or other cheaper material. Premium Zippered Six Sided Cover Twin XL Mattress/ Box Spring Encasement depth 9"(fits 9"-11") size 39"x80"

STRETCHABLE STRONGER Fabric on All Six Sides: Top, Bottom and all other Four Sides along with PREMIUM THREE SIDED ZIPPER, makes this protector/ cover Extra Durable . DOUBLE SIDED USE Since Top and Bottom layers have same Fabric, it's easier to flip the mattress as desired without changing the Mattress encasement side.

NO CRACKLING NOISE & ideal for anyone who is allergic to lamination as this protector is not PU laminated, hence peaceful super quiet sleep anytime. COMFORTABLE, SOFT & BREATHABLE. Despite the strong durability of our material, it is soft to the touch and noiseless, making it ideal for light sleepers. Our encasing guarantees high air and water vapor permeability so it’ll feel as if you never placed anything on your mattress.

HIGH QUALITY PREMIUM ZIPPER - Our industry-leading SmartSeal zippers produce maximum effectiveness and strength to fully protect your sleep and your mattress.

SOFT & QUIET - Total six-sided mattress protection without the "crinkle" you get from vinyl or plastic. Our bamboo jacquard top fabric is super soft, moisture wicking and completely noiseless.

100% WATERPROOF & HYPOALLERGENIC - Protect your expensive mattress from spills, urine or any type of fluid. Get a better night's sleep without the sneezing and runny nose by blocking allergens.

EXTRA HEAVY-DUTY QUALITY: 8 Gauge heavy-duty 100% vinyl durable & comfortable with electronic sealed seems to resist ripping.

FULLY ENCASED ZIPPERED MATTRESS PROTECTOR: for ultimate protection it is fully zippered on 3 sides and features Ultra-Strength Zipper Technology that uses heat-fusion to keep the zipper connected to the protector to prevent rips and zipper breaks.

100% WATERPROOF: Top protection Against any fluids, urine, Pet accidents, and precipitation from All 6 Sides.

ALL-AROUND PROTECTION: By using protective bedding, you can extend the life of your mattress. Whether you are saving it from bedwetting accidents or protecting your mattress from bedbugs and dust mites, protective covers help preserve your mattress in its original condition. Our waterproof bed covers are zippered styled overlays so you get full protection on the top, bottom and sides.

EFFECTIVE BED BUG BARRIER: Unfortunately, bed bugs are very difficult to control. So we take our mattress protection one step further as our products feature a patented tape closure that fits securely over the rust-proof zipper end to form a complete seal that prevents bed bugs and more from getting in or out.

HEAVYWEIGHT 6 GAUGE VINYL: By utilizing our zippered mattress and boxspring covers, you can be sure you are protected. As our heavyweight 6 gauge vinyl covers safeguard against spills, stains, and moisture resulting from accidents, fluids, and sweat. Vinyl encasements also allow for easy care, simply wipe clean with a damp cloth.

100% Waterproof - Kingnex Mattress Encasement protects against accidental spills, stains and moisture to keep your luxury mattress clean - block all liquids from penetrating your expensive mattress

360 All Around Protection - Fully encases and protects your mattress on all 6-sides with fine teeth zipper to completely seal it up, keep all size of those things from the mattress

Soft and Noiseless - Smooth knitted polyester surface that ensures soft and quiet feeling to sleep on and complete protection

Made in the US and made of EVOLON. The award winning German engineered Evolon offers 1 micron filtration using a microfilament technology, creating a physical barrier against very small things.

EVOLON is made using an eco-friendly process and because of its large internal surface area, it can absorb 400% of its weight in water and dries very quickly.

This breathable fabric is not coated, and it has no pvcs and no chemical post treatments, so it is totally breathable. The fabric is rustle-free, comfortable, and has no "plastic" feeling.

WATERPROOF MATTRESS ENCASEMENT: Slumberfy has developed a premium Waterproof Mattress Protector Encasement, with a focus on keeping your family’s mattresses safe from bed bugs and dust mites, as well as liquid spills, sweat, dirt, dust and unhealthy allergens that may be lurking in their mattress. Less dust and dirt in your mattress equal a better night’s sleep, every time!

360° EZ ZIPPER: Slumberfy’s innovative zip off mattress cover is super easy to install or remove and makes laundering breeze. An easy grip zipper is placed around the entire top of the encasement, so the whole cover can be taken on or off in 60 seconds or less!

PREMIUM PROTECTION: Our ultra-breathable bamboo mattress encasement bed bug proof fabric completely surrounds, protects and seals the mattress on all 6 sides, so your mattress is entirely sealed in and out. All-natural hypoallergenic fabric is completely silent, with none of the crinkling sounds you get with a typical mattress protector. Enjoy a sleep experience you simply cannot get anywhere else.

All 6 sides are equipped with waterproof film to ensure the waterproof performance of the mattress cover, urine, beverages or other liquids cannot pass through. Perfectly protect the mattress and ensure that the mattress is clean and tidy!

Comprehensive Protection:The thick and durable zipper design protects your mattress on six sides and prolongs the life of the mattress. Suitable for incontinence, pets, the elderly, children, pregnant women.

Lightweight and no noise: The spunlace non-woven fabric feels light and thin, and the body moves without noise, providing you with a quiet and comfortable sleep experience.

🏚 FILL IN THE GAPS & KEEP THEM TOGETHER - With our complete mattress connector and bed gap filler kit, join any smaller size (Twin XL, Full XL or Queen) two beds to create a King Size bed. No more gaps, bumps, bulges. Softness and comfort instead.

⚙ EASY TO SETUP & STORE – Simply put together the beds, use the pad to fill in the gap between the mattresses and surround the beds with the included strap to make them tight. Make a family bed in minutes. Comes with a storage bag so you can store with easy until you need.

👥 COMPLETE BED DOUBLING SYSTEM – Twin XL to King bed connector kit includes PREMIUM Quality memory foam pad with 75(L)x10(W) inches Hypoallergenic surface fabric on the top, 1.4 inches wide and 33ft long bed strap to keep the beds tight together and a storage bag.

Fit great: Fits twin size mattress perfectly with dimensions 39 inches by 75 inches, 11-13 inches deep.

High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress encasement, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped for a long time.

Waterproof and breathable: Not only the top surface is waterproof like other zippered encasement, the 4 sides and the bottom of this zipped mattress protector are waterproof, which can keep any liquid from leaking into your mattress.

100% Egyptian Cotton

Twin Extra Long Mattress Cover size fitted sheet measures 39 Inch by 75 Inch with 9 Inch pocket

Material: 100-Percnet Long staple Egyptian Cotton, 800 Thread Counts Per Square Inch, Sateen Weave, Solid sheets

Smooth, flexible jersey knit polyester fabric

Safety tested and certified by the Standard 100 by Oeko-Tex

100% Waterproof - Six-sided premium mattress protector blocks perspiration, bed wetting, liquids and stains; 10-year quality guarantee (NOTE: For frequent accidents and easy clean-ups, place a fitted SureGuard Mattress Protector over the encasement).

Bed Bug Proof - Super fine zipper with Invisi-Zip and SureSeal technology completely seals off the mattress from bed bugs - use with a SureGuard Box Spring Encasement

Keeps Your Mattress Clean & Fresh - Blocks dust, dirt and dander on all sides.