This post contains affiliate links. We may earn a small commission when you buy through our links — at no extra cost to you.
Every zippered encasement looks similar online: six sides, a waterproof backing, and a zipper. The part that actually decides whether it works is the zipper track and how the cover fits your mattress. If the zipper snags or the fit is wrong, the seal is incomplete.
Ratings are also mixed across sizes, so a strong overall score doesn’t guarantee the exact depth or size you need. The practical difference shows up in the closure: a smooth, fully closing zipper with a protective flap keeps bed bugs, dust mites, and spills out; a stiff or snagging one creates a gap.
This guide focuses on six-sided covers that seal properly, fit a range of mattress depths, and hold up to washing. Your job is to match the cover to your mattress’s actual depth and decide how much fabric softness matters to you.
Best for Thick Queen Owners
Hospitology Queen Encasement
Key Features
- Mattress Depth: 12-18 inches
- Zipper Seal: 6-sided zipper
- Waterproofing: Waterproof, lab-tested
- Fabric: Polyester knit
- Price: Mid-Range
The Hospitology queen encasement is the strongest all-around fit in this set: a zippered six-sided seal that fully encloses the mattress and stretches to handle 12-18 inch queen depths. The polyester knit shell is soft and quiet, and the lab-tested waterproof lining avoids the vinyl crinkle that makes many bed bug covers noisy under sheets. For a bed bug or dust-mite barrier, the full seal matters more than the fabric choice, and this cover covers both bases.
The zipper track lies flat enough to be unnoticeable under a fitted sheet, and the stretch fit stays put on thicker mattresses without bagging or shifting. Installation takes only a few minutes once the mattress is lifted, and the cover stays in place during normal sleep. That puts it ahead of the budget queen option in the same group, which trades fabric feel and depth range for a lower entry price.
This is for owners of thick queen mattresses who want soft, quiet, waterproof protection at a mid-range price. It is not a cotton-terry cover, and repeated washing may cause seam or barrier wear on some units, so inspect the encasement when you change sheets.
Pros
- Zippered six-sided seal fully encloses the mattress against bed bugs, dust mites, and spills.
- Stretchable 12-18 inch fit holds securely on standard and thick queen mattresses.
- Soft knit surface stays quiet and avoids the plastic feel of many waterproof covers.
Cons
- The five-year warranty is shorter than the 10-year coverage on some rival encasements.
- Seam or barrier wear can appear after repeated washing on some units.
For thick queen mattresses that need full six-sided protection, this encasement delivers the best mix of fit, comfort, and price in the group.
Best for Budget Queen Owners
Linenspa 360 Queen
Key Features
- Mattress Depth: Up to 12 inches
- Zipper Seal: 360-degree zipper
- Waterproofing: Waterproof
- Fabric: Brushed polyester
- Price: Budget
The Linenspa Zippered 360-Degree Mattress Encasement covers a standard queen mattress on all six sides with a brushed polyester shell and waterproof polyurethane backing. It fits up to 12-inch mattresses, including memory foam, and the full zipper makes installation straightforward. The surface is no-frills: less refined than softer knits and a clear step below cotton-terry covers, which makes it better matched to budget-focused owners, guest rooms, or rental properties than to sleepers who want premium fabric. For a queen bed needing bed bug and dust-mite protection on a budget, this is a functional entry point.
Pros
- Fits standard queen mattresses well, including memory foam.
- Easy to put on and take off.
- Works well for everyday protection.
Cons
- Zipper hardware can be stiff or uneven.
- Fabric wear can appear after washing.
A cost-effective full encasement for budget-focused queen owners who accept a simpler fabric surface.
Best for Allergy-Prone Sleepers
SureGuard Queen Terry
Key Features
- Mattress Depth: 9-12 inches
- Zipper Seal: Invisi-Zip, 6-sided
- Waterproofing: Waterproof
- Fabric: Cotton terry
- Price: Premium
SureGuard combines a cotton terry top, waterproof backing, and GREENGUARD Gold certification in a full six-sided enclosure. That makes it the low-tox cotton option for allergy-focused sleepers who want fabric against the skin rather than a polyester knit. The 10-year warranty and spill protection hold up in normal use.
It fits standard 9-12 inch queen mattresses, including low-profile foam, and the premium price buys fabric and certification, not a deeper fit. A quick zipper check before installation is part of owning this one, and it is not the cover for mattresses deeper than 12 inches.
Pros
- Cotton terry top keeps the sleeping surface soft and comfortable against the skin.
- Full six-sided coverage with waterproof backing protects against spills and allergens.
- Fits standard queen mattresses and stays securely in place overnight.
Cons
- Zipper closure can be difficult to close fully on some units.
For a standard 9-12 inch queen, this is the cover that puts cotton comfort and certified low-tox materials first.
Best for Multi-Twin Households
Utopia Twin 2-Pack
Key Features
- Mattress Depth: 13 inches
- Zipper Seal: 6-sided zipper
- Waterproofing: Waterproof
- Fabric: Knitted polyester
- Price: Budget
Two full twin encasements arrive in one order, and each one is a fully zippered six-sided barrier against bed bugs, dust mites, spills, and debris. The knit polyester surface is easy to fit with a second pair of hands because the zipper wraps all the way around the mattress.
This setup suits households with two twin beds, especially kids’ rooms, guest rooms, or college apartments. The cover is not a premium cotton-terry top, and durability can vary: a cover may develop tears or snags during use or washing. At a two-pack budget price, that is a reasonable tradeoff for full six-sided protection.
Pros
- Two full six-sided encasements in one order create strong per-unit value.
- Knit fabric is well-constructed for its price tier.
- Fully zippered barrier blocks spills, dust, and debris when sealed.
Cons
- Zipper can catch during closure, which may compromise the protective seal.
For a two-twin household on a budget, this delivers two functional six-sided encasements without a per-cover premium.
Best for Dorm Twin Xl
FSE Twin XL Encasement
Key Features
- Mattress Depth: 9-16 inches
- Zipper Seal: Velcro-covered zipper
- Waterproofing: Waterproof
- Fabric: Polyester
- Price: Mid-Range
Twin XL sizing with a 9-16 inch depth range and a Velcro-sealed zipper covers dorm mattresses completely. The polyester top feels softer than most waterproof layers, and the six-sided enclosure follows the mattress without loose fabric. A second person makes zipping easier while the fabric is held taut.
Best for allergy-prone students on tall Twin XL dorm beds who want a waterproof, hypoallergenic six-sided barrier. Care instructions are split between machine-wash marketing and hand-wash product details, so check the label before the first wash. The mid-range price fits a dorm budget while the full cover protects against dust mites and bed bugs. This is a Twin XL product, so standard twin or queen buyers should look elsewhere.
Pros
- Complete six-sided seal with a Velcro flap over the zipper gives dorm mattresses full allergen protection.
- Fits Twin XL mattresses up to 16 inches deep without bunching or gaps around the corners.
- Soft polyester surface feels like a fitted sheet, so the waterproof layer is easy to sleep on.
Cons
- Zipper can bind or separate while closing, so the first zip deserves a slow check.
For a dorm Twin XL mattress, this encasement provides full waterproof coverage and enough depth for tall campus beds.
Best for Thicker Queen Owners
SafeRest Queen Encasement
Key Features
- Mattress Depth: Up to 15 inches
- Zipper Seal: 6-sided zipper
- Waterproofing: Waterproof
- Fabric: Cotton terry
- Price: Premium
The SafeRest brings a cotton terry top to six-sided protection, so the surface feels like fabric rather than plastic while the full-perimeter zipper seals the mattress. Its Queen size covers mattresses up to 15 inches deep, which puts it ahead of the slimmer cotton option in this line-up.
This is for owners who want a soft cotton cover and a complete bug-proof seal without moving to a luxury price tier. It’s not for 18-inch mattresses, and washing can cause fabric tears or zipper issues near the upper depth limit.
Pros
- Cotton terry top keeps the surface feeling like fabric rather than plastic.
- Full-perimeter zipper encloses the mattress completely.
- Fits queen mattresses up to 15 inches with room to spare.
Cons
- Premium pricing puts it above budget-friendly encasements.
The SafeRest is the cotton-terry answer for queen mattresses within its 15-inch depth range.
Best for Noise-Sensitive Queen Owners
Guardmax Queen Encasement
Key Features
- Mattress Depth: 12 inches
- Zipper Seal: 6-sided zipper
- Waterproofing: Water resistant
- Fabric: Jersey knit
- Price: Mid-Range
The jersey knit keeps night noise low and the full zippered enclosure fits standard queen mattresses up to 12 inches. Zipper quality can vary, which keeps this below the top queen pick for bed bug protection; inspect the zipper before installing.
Pros
- Jersey knit fabric stays quiet and feels soft against the skin.
- Full zippered enclosure covers all six sides for spill, accident, and bed bug protection.
Cons
- Zipper can snag or separate on some units, so inspect before installing.
For a standard-depth queen sleeper who prioritizes softness and quiet, this cover is a reasonable mid-range alternative.
Best for Budget Single Twin
Utopia Premium Twin
Key Features
- Mattress Depth: 12 inches
- Zipper Seal: 6-sided zipper
- Waterproofing: Waterproof
- Fabric: Knit polyester
- Price: Budget
Soft polyester knit gives this zippered six-sided cover a quiet feel while enclosing a twin mattress. It slides on and seals against bed bugs and dust mites. Durability can vary with rips or tears, and the single-cover format trails the two-pack twin pick for multi-bed households — but the entry-level price suits a first-time encasement buyer.
Pros
- Six-sided zippered enclosure provides basic bed-bug and dust-mite protection for a twin mattress.
- Soft knit fabric feels quiet and silky rather than crinkly.
Cons
- Only fits twin mattresses up to 12 inches deep.
For a single twin mattress on a tight budget, this zippered six-sided cover delivers softness and complete encasement.
How to Choose
A bed bug mattress cover only works if the zipper closes completely and the fit matches your mattress; most people only realize this after a snag or a seam tear.
Match the Depth to the Mattress
Measure your mattress before choosing a depth. A cover that is too shallow strains the zipper and pulls away from the corners; one that is too deep wrinkles and slides as you move. Most standard mattresses sit between 9 and 12 inches, while pillow tops and thick foam models can reach 14 to 18 inches.
Stretch-fit covers like a 12-18 inch model tolerate more variation, but they can fit loosely on a thin mattress. If your mattress is right at the edge of a cover’s range, size up rather than forcing it.
Zipper Design and Seal
The zipper is the only barrier between bed bugs and the inside of your mattress. A full 360-degree zipper lets you separate the top and bottom completely, which makes it easier to install and remove. A Velcro flap over the zipper blocks dust and insects from working through the zipper track.
Test the zipper before you put anything on the mattress. If it catches, skips, or won’t close fully, exchange it immediately; no amount of fabric quality can fix a broken seal.
Waterproofing
Most waterproofing comes from a thin polyurethane membrane bonded to the fabric. It blocks spills and makes cleanup simple, but the membrane can crack or separate after repeated hot washes and high-heat drying.
Use cold or warm water and a low dryer setting to protect the barrier. A cover that stays flexible is more likely to survive years of laundering.
Fabric Feel
Cotton terry tops feel like a normal mattress pad and breathe well, but they cost more. Polyester knits are cheaper and often quieter, but they can trap heat against your skin.
If you dislike crinkly or plastic-like fabric, look for jersey or knit descriptions rather than vinyl-feel materials.
Warranty and Certifications
A longer warranty signals expected lifespan, but it does not guarantee zipper quality. GREENGUARD Gold certification matters if you want low chemical emissions, especially for allergy sufferers or children’s rooms.
Inspect the zipper the day it arrives. A warranty can cover a replacement later, but an early exchange is faster.
FAQ
Can I machine wash a bed bug mattress encasement without ruining the waterproof layer?
Use cold or warm water on a gentle cycle and dry on low heat to protect the polyurethane membrane. High heat and fabric softener are the main reasons waterproof layers crack or peel. If the cover still seals and the zipper closes, it is still doing its job.
Why does my zippered mattress encasement have a Velcro flap over the zipper?
The Velcro flap sits over the zipper track so dust mites and bed bugs cannot use the tiny gaps between zipper teeth as an entry point. It also reduces snagging when you change sheets. Press it flat after zipping.
Will a 12-inch deep mattress encasement fit a 14-inch pillow top mattress?
Usually not. A cover labeled for a 12-inch mattress is measured to the full depth, and a pillow top can push a mattress past that limit. Forcing it on can stretch the zipper and create gaps, so choose a cover rated for at least 15 inches.
How can I tell if a bed bug mattress cover has a proper six-sided seal?
Look for a zipper that runs around all four edges of the bottom panel, or along the sides and bottom, with the top surface fully enclosed. A fitted-sheet-style cover that only wraps the top is not a bed bug encasement. Listings that say ‘360 degree’ or ‘6-sided’ describe the correct full-seal style.