A good mattress or box spring encasement should fit snugly, close securely, and match the exact size and depth of your bed. The three options below differ in what they cover: Moonsea is a full-size mattress encasement, Amazon Basics is designed for mattress and box spring protection, and Biloban is aimed at low-profile box springs. Check the fit details carefully before choosing, especially if you need protection for both parts of your bed.
Quick Comparison
| Product | Best for | Key fit details | Protection and design |
|---|---|---|---|
| Moonsea Zippered Waterproof Full Mattress Encasement | Full mattresses | 54 × 75 inches; 8–10-inch pocket | Six-sided waterproof backing and zip closure |
| Amazon Basics Mattress and Box Spring Protector | Covering a mattress and box spring | Stretches to fit depths from 12–18 inches | Six-sided coverage; breathable, vinyl-free polyester |
| Biloban Queen Low-Profile Encasement | Low-profile box springs | Listed depth options vary; supplied details specify up to 5 inches for a low-profile box spring | Six-sided zippered cover with waterproof PU backing |
Our Picks: Best Mattress And Box Spring Encasements reviews
Moonsea: A Full Mattress Encasement with Waterproof Coverage
The Moonsea is a zippered cover made for a full-size mattress measuring 54 by 75 inches. Its stated pocket depth is 8 to 10 inches, so it is best suited to a mattress within that range rather than a tall pillow-top or unusually thick model.
The cover has waterproof backing on all six sides, including the top, bottom, and edges. A knitted polyester outer fabric is designed to stretch around the mattress, while the zipper and stitching are intended to keep the encasement closed and in place. This makes it a practical choice for protecting a full mattress from spills, perspiration, and stains.
One important limitation: the supplied product details describe a mattress encasement, not a separate box spring cover. If you want both parts of your bed enclosed, plan to find a compatible box spring cover separately. Also measure your mattress depth before ordering; the narrow 8–10-inch fit range is less flexible than the Amazon Basics option below.
Pros:
- Full-size fit is clearly specified at 54 by 75 inches.
- Waterproof backing covers all six sides.
- Stretchy knitted polyester fabric is designed to fit around the mattress.
- Machine washable in cold water and suitable for low-heat tumble drying.
Cons:
- Designed for mattresses 8–10 inches deep, which may not fit thicker models.
- The supplied details do not confirm that a box spring cover is included.
Verdict: Choose Moonsea if you have a full mattress within the stated depth range and want a six-sided waterproof cover; look elsewhere if you need a complete mattress-and-box-spring set.
Amazon Basics: Flexible Coverage for a Mattress and Box Spring
The Amazon Basics protector is the most direct match if your goal is to cover both a mattress and a box spring. Its product title specifies both, and the supplied description calls out all-around, six-sided coverage. Check the selected size and package details on the listing so you know the cover configuration matches your bed.
The fabric is a breathable, vinyl-free polyester rated at 145 gsm. It is designed to stretch around depths from 12 to 18 inches, giving it a broader stated fit range than the Moonsea encasement. The product description also lists protection against moisture, liquid spills, and dust.
This is a useful middle-ground option for shoppers who want enclosed coverage without a vinyl feel. Its depth range is still a real limit: a mattress or box spring outside 12–18 inches may not fit properly. The supplied details do not specify washing instructions, so follow the care label rather than assuming a particular wash or drying method.
Pros:
- Designed for mattress and box spring protection.
- Six-sided coverage helps enclose the surfaces and sides.
- Breathable, vinyl-free polyester fabric.
- Stretches to fit depths from 12 to 18 inches.
Cons:
- The stated depth range may not suit very shallow or extra-deep bedding.
- Care instructions are not included in the supplied product details.
Verdict: Pick Amazon Basics if you want a mattress-and-box-spring protector with a flexible 12–18-inch depth range and breathable, vinyl-free fabric.
Biloban: A Low-Profile Option for Queen Box Springs
The Biloban is listed as a queen zippered protector, with a design that can also help cover a low-profile box spring. Its supplied details describe a close fit for a box spring up to 5 inches deep. That makes it a specialized choice rather than a general cover for thick mattresses or standard-height foundations.
Waterproof PU backing runs across the six sides, and the zipper closes the cover around the item. The product title lists several depth options, so check the exact option selected and compare it with your box spring or mattress measurement. The supplied description emphasizes the low-profile box spring fit; do not assume every listed depth option fits that use equally well.
The encasement can provide a neater appearance by covering a low-profile box spring, as well as helping shield it from liquid spills. However, the product details do not establish that a mattress cover and box spring cover are both included in one purchase. Confirm the selected configuration before ordering if you need protection for both.
Pros:
- Designed with low-profile box springs in mind.
- Six-sided coverage with waterproof PU backing.
- Zippered design fully encloses the covered item.
- Machine washable in cold water and suitable for low-heat tumble drying.
Cons:
- The supplied fit details specify a low-profile box spring up to 5 inches deep.
- Depth options and the included cover configuration should be checked carefully before purchase.
Verdict: Consider Biloban if you need a queen-size, zippered cover for a low-profile box spring and have confirmed the selected depth fits your foundation.
How to Choose a Mattress and Box Spring Encasement
Decide What You Need to Cover
First, check whether you need to cover only the mattress, only the box spring, or both. The Moonsea details specify a full mattress cover, while Amazon Basics is described as a mattress and box spring protector. Biloban is a more specialized option with details focused on a low-profile box spring. If you need two separate covers, confirm what the selected listing includes before you buy.
Measure the Size and Depth
Match the cover to the item’s length and width, then measure its depth from the bottom edge to the top surface. A cover that is too shallow may be difficult to zip closed; one that is too deep may fit loosely. The listed ranges differ: Moonsea specifies an 8–10-inch pocket, Amazon Basics states 12–18 inches, and Biloban’s supplied description highlights a low-profile box spring up to 5 inches deep. Compare your measurements with the exact size and depth option you select.
Look for Six-Sided Coverage and a Secure Closure
A six-sided encasement covers the top, bottom, and sides of the item. That is different from a pad or fitted protector that covers only the top and edges. A zipper helps close the enclosure, but check that the product description matches the level of coverage you want. These supplied product details describe protection from liquids, moisture, or spills; they do not establish protection against every type of pest or hazard.
Choose a Fabric That Suits Your Needs
Fabric can affect feel and breathability. Amazon Basics specifies breathable, vinyl-free polyester, while Moonsea describes a stretchable knitted polyester fabric. Biloban specifies waterproof PU backing. Compare the details that matter to you, and remember that a waterproof layer may feel different from an uncoated fabric protector.
Check Care Instructions
Wash and dry the cover as directed so the fabric and waterproof backing are not exposed to unsuitable heat or cleaning products. Moonsea and Biloban specify cold-water machine washing and low-heat tumble drying, with instructions not to bleach; Moonsea also says not to iron. The supplied Amazon Basics details do not include care directions, so check its label or listing before washing.
Consider How You Will Handle a Spill
A zippered cover is designed to stay around the mattress or foundation, so removing it for cleaning may take more effort than lifting off a fitted protector. If you expect frequent laundering, consider whether you can remove and replace the cover easily. For the Moonsea option, the product description suggests having extra encasements available, but the right number depends on your household and laundry needs.
Frequently Asked Questions
What is the difference between a mattress protector and an encasement?
A fitted protector commonly covers the top and sides of a mattress. An encasement closes around the item and is intended to cover all six sides. Check the product description for six-sided coverage and a zip closure if you want the mattress or box spring fully enclosed.
Can I use the Moonsea cover on a box spring?
The supplied Moonsea details describe a full-size mattress encasement with an 8–10-inch pocket. They do not confirm a separate box spring fit. Measure your foundation and use a cover specifically described for that item if you need box spring protection.
Does the Amazon Basics protector cover both the mattress and box spring?
Its title and supplied description identify it as a mattress and box spring protector. Check the selected size and package details on the listing to confirm the configuration suits your bed.
How do I know whether an encasement will fit?
Measure the item’s length, width, and depth, then compare all three measurements with the product’s stated size. Pay special attention to depth because the options here have different fit ranges.
Are these encasements waterproof?
The supplied descriptions identify Moonsea and Biloban as waterproof, and describe Amazon Basics as protecting against moisture and liquid spills. Follow the care instructions and make sure the cover is fully closed for the intended coverage.
Can I machine wash these covers?
Moonsea and Biloban specify machine washing in cold water and tumble drying on low; both say not to bleach. The supplied Amazon Basics description does not specify wash care, so check its product label or listing instructions.
Final Recommendation
For a full mattress that measures 8–10 inches deep, Moonsea is the clearest fit. If you want a protector designed for both a mattress and box spring, Amazon Basics offers the most direct match and a stated 12–18-inch depth range. For a low-profile queen box spring, Biloban may be the better fit, provided the selected depth matches your measurements. In every case, verify the size, depth, and included cover configuration before ordering.