Best Bed Bug Mattress Encasement (2026): Zippered Covers That Seal All Six Sides
Bedding
A zippered encasement covers all six sides of a mattress, unlike a fitted protector. Pick by mattress depth first, then decide whether you want a terry surface or a quieter synthetic one.
Our picks
Shop the full bedding category if you are still deciding between barrier types. For everyday spill protection on top only, start with our best mattress protector guide before you buy a six-sided zip cover.
An encasement does a different job from the fitted cover most people call a mattress protector. It wraps the whole mattress, then closes with a zipper. That matters when you want the sides and bottom covered as well as the sleep surface.
If you think you have an active bed bug problem, use an encasement as one part of a treatment plan from a qualified professional. The cover is a barrier. It does not diagnose an infestation or make one disappear on its own.
Start with a tape measure, not a product photo. An encasement that is too shallow stresses the zipper. One that is far too loose bunches under the sheet. Depth is the decision that actually matters.
What makes a good mattress encasement for bed bugs
Measure your mattress height, including any attached pillow top. Then check that it is a true six-sided design. A fitted protector covers the top and sides. A zippered encasement should cover the top, sides, and bottom, with a zipper flap or other guard that keeps the closure from opening accidentally.
Waterproofing is useful even if bed bugs are the reason you started looking. The encasement may stay on for a long time, and it is much easier to protect a mattress from sweat, spills, and pet accidents while it is already wrapped.
Hot sleepers should expect a little extra warmth from any waterproof membrane. Pair a thin cover with breathable sheets. A noisy vinyl feel is the old problem. Modern knitted and terry surfaces are quieter, but they still add a layer.
Quick comparison
All three are queen-size, waterproof, six-sided encasements. The deciding point is not a vague promise of protection. It is whether the depth range, fabric feel, and wash routine suit the bed you already own.
SafeRest: best for a thick mattress
The SafeRest 15-18 Inch encasement is the easy first choice for a deep pillow-top, hybrid, or other tall queen mattress. It gives you more room at the corners than a 12-inch cover, so you are less likely to tug hard on the zipper during installation.
The surface uses cotton terry over a waterproof layer. That is a better bet if you dislike the smooth, synthetic feel of many inexpensive covers. You will notice the terry less under a fitted sheet, and spills still sit on the membrane instead of soaking the mattress.
Choose SafeRest if: your mattress measures 15 to 18 inches deep and you want a cover you are less likely to notice under your sheets.
Skip SafeRest if: your mattress is 12 inches or less and the extra depth would leave too much loose fabric.
Linenspa: best value for a standard mattress
Linenspa is the practical choice when your mattress is no more than 12 inches deep. Its six-sided zippered cover is waterproof, machine washable, and backed by a 10-year limited warranty. It is also the strongest value pick here because you do not pay for extra material you cannot use.
Do not assume it will stretch over a 14-inch pillow top just because it is flexible. A too-shallow cover puts the zipper under load and can tear at the corners. Measure, then buy the depth that matches.
Choose Linenspa if: you have a standard-height mattress and want a proven encasement without paying for a deep-pocket model.
Skip Linenspa if: your mattress is taller than 12 inches after you measure it.
Utopia Bedding: best budget 14-inch option
Utopia Bedding sits between the other two on depth. Its 14-inch queen model costs less than many premium encasements while giving you more room than a standard 12-inch cover. The smooth knitted polyester fabric is designed to stay quiet, but it will feel different from terry.
The honest drawback is the fabric: if you are sensitive to a synthetic sleep surface, pay more for the SafeRest instead of hoping this one will feel like cotton. Fit, the full zip-around design, and leak protection are the reasons to buy it.
Choose Utopia if: your mattress is close to 14 inches deep and you want full coverage on a tighter budget.
Skip Utopia if: you specifically want a terry top or have a very thick mattress.
How to put an encasement on without tearing it
An encasement is easiest to install with two people, especially on a queen or king bed. Remove sheets and any topper first. Stand the mattress on its long edge if you can do so safely, then slide the open encasement over one corner at a time.
Zip it slowly once every corner is covered. Do not pull the zipper through a tight spot by force. If the cover feels too tight before it is halfway closed, stop and check the depth range rather than risking a torn seam.
After it is closed, put your fitted sheet on top. You can also add a fitted mattress protector over the encasement. That setup leaves the full cover in place and gives you a simpler top layer to wash after a spill.
Encasement vs mattress protector
A mattress pad changes the feel of the bed. An encasement does not aim to add comfort. It is a barrier that stays under your sheets, so choose it for coverage and fit rather than for a plush surface.
If those terms still blur together, read our guide to mattress protector vs mattress pad. The short version is simple: an encasement wraps the mattress, a protector sits over it, and a pad adds padding.
Care and safety checks
Follow the washing and drying directions printed on the specific cover. Waterproof membranes can be damaged by high heat or harsh bleach, even when the outer fabric looks fine. Keep a fitted sheet over the encasement and wash that sheet normally.
Check the zipper and seams when you change bedding. If the zipper has opened or the cover has a tear, replace it. A six-sided barrier only works when all six sides remain covered.
An encasement can support a bed bug prevention or treatment plan, but it cannot diagnose an infestation or make one disappear on its own. If you see signs of activity, get specific advice from a licensed pest professional instead of relying on a product page.
Final take
For a thick queen mattress, buy the SafeRest Zippered Mattress Protector, Queen 15-18 Inch Deep. Its depth range and terry surface make it the most comfortable long-term pick. For a standard-height mattress, the Linenspa Encasement Waterproof Mattress Protector offers the best value. The Utopia Bedding Premium Waterproof Bed Bug Mattress Cover is the budget choice when you need a little more depth.
Once the mattress is fully covered, keep the sleep surface cool and easy to wash with cooling sheets. If you only need everyday spill protection, compare the best mattress protectors before paying for a full encasement.
Frequently Asked Questions
Do mattress encasements kill bed bugs?
No. An encasement is a physical barrier. It can help contain bugs already in a mattress and prevent new ones from getting into it, but an active infestation needs a proper treatment plan.
Do I need an encasement or a fitted mattress protector?
Buy an encasement when you want all six sides covered. A fitted protector is faster to remove and wash, but it leaves the mattress bottom and much of the sidewall uncovered.
How do I know whether an encasement will fit my mattress?
Measure the mattress from the bottom seam to the highest point of the top surface. Do not use the depth printed on a sheet label. Choose an encasement whose stated depth range includes that measurement.
Can I put a mattress protector over an encasement?
Yes. Many households leave the encasement on for long-term full coverage and use a fitted protector on top for easier spill cleanup.
Are mattress encasements noisy or hot?
A good modern encasement should be much quieter than old vinyl covers. The material still adds a waterproof layer, so hot sleepers should choose a thin cover and use breathable sheets.
How long should a bed bug encasement stay on the mattress?
Leave a quality encasement on for at least a year when it is part of a treatment plan. Check the zipper and seams when you change sheets, and replace the cover if it tears or the closure stops sealing.