The best 5-inch mattress cover depends on the mattress size and the kind of protection you need. For a fitted encasement designed for shallow mattresses, Bedecor covers 3–6-inch depths, while Mattressentials is made for 5–7-inch depths. DMI offers a 6-inch-deep protector, and GRT’s fitted protector starts at 5 inches. For a standard-size crib mattress, Biloban’s crib protector fits mattresses up to 6 inches thick.
| Product | Best For | Depth Fit |
|---|---|---|
| Bedecor Zippered Protector | All-around encasement | 3–6 inches |
| Mattressentials Encasement | Zippered coverage and allergen shielding | 5–7 inches |
| DMI Waterproof Protector | Simple fitted protection | 6 inches |
| GRT Twin Protector | Two protectors and flexible fit | 5–19 inches |
| Biloban Crib Protector | Standard-size crib mattress | Up to 6 inches |
Bedecor Zippered Twin Mattress Protector
Best for: Twin mattresses around 5 inches deep when a full zippered cover is preferred. Bedecor lists a 3–6-inch depth range, placing a 5-inch mattress within its stated fit. Its six-sided design encloses the mattress, and the waterproof layer is intended to guard against spills and accidents.
The listed fabric is soft and breathable, and the cover is described as suitable for adults, children, and pets. Choose this if you want full coverage rather than a protector that only sits over the top and sides.
Limitation: It is listed for twin mattresses, so it may not suit another mattress size. Measure the mattress before ordering.
Mattressentials Zippered Mattress Encasement
Best for: A 5-inch twin mattress that needs a zippered, six-sided enclosure. The specified depth range is 5–7 inches, so a mattress measuring exactly 5 inches is at the lower end of the stated fit. Features include waterproof protection, a zipper seal with a Velcro closure, and a barrier intended to shield against allergens and dust.
This is a better match than a deep-pocket fitted protector if enclosing the entire mattress is the priority. It may also suit households seeking a cover that helps keep pet hair and dust away from the mattress.
Limitation: The listed depth range starts at 5 inches. Check the actual mattress depth and twin dimensions before choosing it.
DMI Waterproof 6-Inch Mattress Protector
Best for: A mattress measuring 36 by 80 inches and up to 6 inches deep. That stated depth makes it a close option for a 5-inch mattress, provided the mattress’s length and width also match. The fitted-sheet style is designed to slide over the mattress, with deep pockets intended to reduce shifting.
DMI describes this protector as waterproof and suitable for spills, bedwetting, incontinence, and pet dander. Choose it if you want a fitted protector rather than a zippered encasement.
Limitation: Its 36-by-80-inch dimensions are not the common 39-by-75-inch twin measurements listed by some other products here. Confirm your mattress size carefully.
GRT Twin Waterproof Mattress Protector
Best for: Twin mattresses 5 inches deep when you want a fitted protector with a broad depth range. GRT lists a twin size of 75 by 39 inches and a stretchable skirt that fits mattress depths from 5 to 19 inches. The product comes as a two-pack, which provides another protector to use when one needs changing.
Its listed construction includes a microfiber top, an added layer, and waterproof TPU backing. Choose this if flexible depth fit and having a spare cover are more important than a tight-fitting zippered enclosure.
Limitation: The 5-inch minimum means a mattress below that depth is outside the listed range. The broad fit range may also be less snug than a cover designed specifically for shallow mattresses.
Biloban Waterproof Crib Mattress Protector
Best for: A standard 28-by-52-inch crib mattress that is 5 inches deep or less. Biloban lists a 28-by-52-inch protector designed for crib mattresses up to 6 inches thick. Its fitted style, soft fabric, and noiseless construction are presented as features for a comfortable crib surface.
This is the most appropriate choice in this list for a shallow crib mattress, not an adult twin mattress. Choose it only when the crib mattress dimensions match the stated size.
Limitation: Its crib dimensions make it unsuitable for a standard adult twin mattress, even if the mattress depth is 5 inches.
Buying Guide: How to Choose a 5-Inch Mattress Cover
Does the cover match the mattress dimensions?
Check length and width as well as depth. “Twin” does not always mean identical measurements: the DMI protector is listed as 36 by 80 inches, while GRT lists 39 by 75 inches. Crib covers use still different dimensions. Compare the product’s stated measurements with the mattress label or your own measurements before buying.
Should you choose a fitted protector or a zippered encasement?
A fitted protector covers the sleeping surface and sides and is generally simpler to put on or remove. A zippered encasement surrounds all six sides. Bedecor and Mattressentials are options here when full enclosure matters; DMI and GRT use fitted styles. Consider how often you expect to remove the cover for laundering.
What depth range should you look for?
For a mattress that measures 5 inches deep, prioritize a listed range that includes 5 inches. Bedecor states 3–6 inches, Mattressentials states 5–7 inches, and GRT starts at 5 inches. A cover made for a deeper mattress may fit loosely, while a cover with a range that starts above 5 inches may not fit as intended. Account for any added mattress topper when measuring.
Which protection features matter?
Choose a waterproof option if protection from spills or accidents is important. For coverage around the whole mattress, look for a zippered design. Breathable or soft fabric descriptions may matter for comfort, but product descriptions do not establish how a cover will feel to every sleeper. Follow the care instructions supplied with the selected product.
Frequently Asked Questions
What size mattress cover fits a 5-inch mattress?
Choose a cover that matches the mattress’s length and width and explicitly includes a 5-inch depth. Depth alone is not enough to confirm a fit.
Is a 6-inch cover suitable for a 5-inch mattress?
It can be, if the product’s listed depth range includes 5 inches and its other dimensions match. The DMI cover is listed as 6 inches deep, while Bedecor lists a 3–6-inch range.
Is a zippered encasement better than a fitted protector?
Neither style is best for every buyer. A zippered encasement covers all six sides; a fitted protector is a simpler option when top-and-side coverage is sufficient.
Can I use a crib mattress cover on a twin mattress?
No. A crib cover such as Biloban’s is sized for a 28-by-52-inch mattress. Match the cover dimensions to the mattress rather than relying on depth alone.
How do I measure mattress depth?
Measure vertically from the mattress bottom edge to its top surface. Include a topper only if it will stay on the mattress beneath the cover.