A deep mattress can push an ordinary fitted protector off the corners or leave it too stretched to stay in place. Before choosing one, measure your mattress—including any topper—and compare that total height with the product’s pocket range. These five options offer different balances of waterproof protection, added cushioning, and fit depth, so the right pick depends on how much coverage and comfort you need.
Quick Comparison
| Product | Listed Fit | Notable Features | Best For |
|---|---|---|---|
| Bedsure Quilted Waterproof Mattress Protector | Up to 22 inches | Quilted, waterproof, OEKO-TEX certified | A deep queen mattress and straightforward protection |
| PRIMESOFT Pillow-Top Mattress Topper | Listing description says 8–25 inches | Down-alternative fill, breathable fabric, water resistance | Adding a cushioned layer to a deep king mattress |
| QUIETSEA Five-Layer Waterproof Mattress Pad | 8–21 inches | Quilted layers, waterproof barrier, full-wrap skirt | Quiet protection with a more padded feel |
| MASVIS Bamboo-Derived Viscose Mattress Topper | 8–21 inches | Plush fill, waterproof protection, viscose-derived fabric | A queen mattress that could use extra cushioning |
| Cozymaker Waterproof Mattress Protector | Description says 8–27 inches; title says 8–21 inches | Waterproof TPU, 3D air fabric, elastic band | Shoppers who need a particularly deep fit |
Our Picks: Best Mattress Protector For Deep Mattress reviews
Bedsure: Quilted Waterproof Protection for Deep Queen Mattresses
This queen-size protector pairs a quilted surface with a waterproof TPU layer underneath. Its four-layer construction is designed to add some softness while helping shield the mattress from spills and other liquid damage. It is a protector with light padding, rather than a thick topper meant to substantially change how a mattress feels.
The deep pocket is listed to fit mattresses up to 22 inches thick, and an elastic band around the edge helps hold it in place. Measure your mattress before ordering; the maximum depth is useful only if the protector’s skirt can stretch over your mattress and any existing topper. Bedsure also lists Standard 100 by OEKO-TEX certification and machine-wash care on a gentle, cold cycle, with tumble drying on low.
Compared with the plush-filled options below, this is a more direct choice when protection and a quilted surface matter more than adding loft. Its main limitation is the 22-inch maximum: shoppers with a taller mattress may want to consider an option with a larger stated fit range, while checking that product’s specifications carefully.
Pros:
- Waterproof TPU layer helps protect against liquids.
- Deep pocket fits mattresses up to 22 inches thick.
- Quilted, four-layer design adds a softer surface.
- Machine washable; the product is listed as Standard 100 by OEKO-TEX certified.
Cons:
- Queen size only, based on the supplied product details.
- May not fit mattresses thicker than 22 inches.
Verdict: Choose Bedsure if you have a deep queen mattress under 22 inches and want quilted, waterproof protection without a bulky topper.
PRIMESOFT: A Cushioned King-Size Topper with a Deep Pocket
PRIMESOFT is a padded mattress topper, not just a thin cover. Its fabric blends rayon fiber and polyester, and it has down-alternative filling intended to add a softer, more cushioned layer. The product description also presents it as breathable and water resistant, so it may appeal if you want some mattress protection along with extra padding.
There is a detail worth checking before you buy: the title says the pocket fits up to 21 inches, while the supplied description says it fits mattresses from 8 to 25 inches. Because those specifications do not match, confirm the current fit range on the product listing or with the seller, especially if your mattress is near the upper limit. The description also gives machine-wash and low-temperature drying guidance.
Unlike the Bedsure protector, this pick is designed to change the feel of the bed with fill. That can be useful for someone seeking a plusher surface, but it also means there is more material to fit beneath the sheets. The available details do not specify a waterproof membrane, so do not assume its water-resistance claim provides the same barrier as a protector that explicitly lists a TPU layer.
Pros:
- Down-alternative filling adds a cushioned layer.
- Fabric blend is described as soft and breathable.
- Product description claims water resistance.
- Machine-washable care is listed.
Cons:
- The listed maximum pocket depth conflicts between the title and description.
- It is a padded topper, which may feel bulkier than a basic protector.
Verdict: Consider PRIMESOFT if you want added cushioning on a king bed, but verify the pocket depth and level of liquid protection before ordering.
QUIETSEA: Five-Layer Queen Pad with an 8–21-Inch Fit
QUIETSEA combines a quilted, padded surface with a waterproof barrier in a five-layer design. The product description says the construction uses a microfiber top, filling, a waterproof shield, and a knit bottom, aiming to provide a softer feel without the crinkly sound associated with some protectors. It is a queen-size pad intended to offer more cushioning than a simple fitted cover.
The 360-degree skirt is listed for mattresses from 8 to 21 inches thick, and an elastic band is intended to help keep the pad from shifting. That range makes it a possible fit for many deep mattresses, but it is not the best match if your total mattress height exceeds 21 inches. The care instructions call for a gentle cold wash and low-heat tumble dry.
Compared with the Bedsure, QUIETSEA offers a higher stated pocket depth only if your mattress is within the shared range, and it emphasizes five-layer construction and a quiet feel. It does not reach as deep as the widest claimed fit on the Cozymaker, but its depth range is clearly stated in the supplied information.
Pros:
- Waterproof barrier is paired with a five-layer padded design.
- Listed to fit mattresses from 8 to 21 inches thick.
- 360-degree skirt and elastic band are designed for a secure fit.
- Machine washable with low-heat drying instructions.
Cons:
- Queen size only, based on the supplied details.
- Not listed for mattresses thicker than 21 inches.
Verdict: QUIETSEA is a strong option if you want a padded, waterproof queen protector and your mattress is no taller than 21 inches.
MASVIS: Plush Queen Topper with Bamboo-Derived Viscose Fabric
This queen-size option is a filled topper with a waterproof function, rather than a minimal mattress cover. Its fabric is described as viscose derived from bamboo, with down-alternative fill designed to create a fluffy, cushioned surface. The product listing also describes the fabric as soft and breathable, though those material claims do not guarantee that every sleeper will feel cooler.
MASVIS is listed for mattresses 8 to 21 inches thick. Its 60-by-80-inch dimensions are listed as queen size, and the care directions call for a gentle machine wash and low-heat tumble drying. The product description says the fill is designed to retain its shape, but the long-term result will depend on use and care.
For a deep bed that needs both extra padding and a waterproof layer, MASVIS has a broader role than a basic protector. The trade-off is added loft and bulk under your sheets. If you only want a protective barrier and prefer your mattress’s existing feel, the quilted Bedsure may be the more straightforward choice.
Pros:
- Waterproof function and padded fill are combined in one product.
- Listed to fit mattresses from 8 to 21 inches thick.
- Viscose-derived fabric and down-alternative fill add a soft surface.
- Machine-wash and low-heat drying care are listed.
Cons:
- The added fill may be too plush for shoppers who want a thin protector.
- The stated depth range does not cover mattresses taller than 21 inches.
Verdict: Pick MASVIS if your queen mattress is within the 8–21-inch range and you want waterproof protection plus a noticeably cushioned layer.
Cozymaker: Waterproof King Protector with a Deep-Fit Claim
Cozymaker is a king-size fitted protector with a soft fiber surface and a double-layer TPU waterproof backing, according to the product description. It also lists a 3D air fabric construction and a 360-degree elastic band intended to help the cover stay in place. This design is focused more on guarding the mattress than adding substantial cushioning.
The fit specifications need extra attention: the product title says it fits mattresses from 8 to 21 inches, while its description says 8 to 27 inches. That difference could affect whether it fits your bed, so check the product listing before purchasing if your mattress is deep. The description also says it is machine washable and should be tumble dried on low; it advises against ironing, bleaching, and dry cleaning.
Among these picks, Cozymaker has the widest claimed upper fit limit, but that claim is inconsistent in the supplied details. It may be a good candidate for a deeper king mattress if the listing confirms the larger range. For a mattress under 21 inches, the other listed dimensions and features may be easier to compare without that uncertainty.
Pros:
- Double-layer TPU backing is designed to block liquids.
- Soft fiber surface and 3D air fabric are listed.
- 360-degree elastic band is intended to help limit shifting.
- Machine washable, with low-heat tumble drying listed.
Cons:
- The title and description give different maximum mattress depths.
- King size only, based on the supplied product details.
Verdict: Cozymaker is worth considering for a deep king mattress, but confirm whether the current listing supports the 21-inch or 27-inch maximum before buying.
How to Choose a Mattress Protector for a Deep Mattress
Measure the Full Mattress Height
Measure from the bottom edge of the mattress to its top surface, including any topper that will stay on the bed. Compare that measurement with the product’s stated pocket range. A protector that is too shallow may pull up at the corners, while one with excess fabric may not sit snugly. If your mattress is near the stated maximum, check how the manufacturer defines mattress depth and confirm the fit range on the product listing.
Decide Between a Protector and a Padded Topper
A protector mainly helps shield the mattress from spills, sweat, and everyday mess. A quilted pad or filled topper can add cushioning as well as protection, but its extra loft may change how the bed feels and make it harder to fit your sheets. Choose a thinner style if you want to preserve your mattress’s feel; consider a padded option if you specifically want a softer surface.
Check the Waterproof Construction
Look for a clear description of the waterproof layer if liquid protection is important to you. Bedsure and Cozymaker list TPU layers, while QUIETSEA describes a waterproof barrier. PRIMESOFT is described as water resistant, which is not the same wording as a waterproof membrane. Compare the exact claim with your needs instead of assuming every padded cover provides the same level of protection.
Consider Fabric, Padding, and Sleep Feel
The surface material and fill affect the feel of the bed. A quilted protector offers some surface padding, while down-alternative fill is intended to make a topper plusher. Breathability descriptions can help you compare materials, but they do not promise that a product will feel cool to every sleeper. Think about whether you want a smooth protective layer or a more cushioned sleeping surface.
Look for Secure-Fit Details
An elastic skirt, a full-wrap design, or a band around the edge can help keep a fitted protector in place. These features do not replace measuring: the product still needs enough pocket depth to cover the mattress. If you use a separate topper, include it in your measurement and make sure your sheets can accommodate the combined height too.
Review the Care Instructions
Machine washing can make routine care easier, but follow the product’s specific instructions. Several options here call for a gentle wash and low-heat tumble drying. Avoid higher heat or cleaning methods the manufacturer does not allow, especially when the product has a waterproof backing or filled layers.
Check for Conflicting Specifications
Some supplied product details list different maximum depths in the title and description. PRIMESOFT gives a 21-inch maximum in its title and a range up to 25 inches in its description; Cozymaker lists 21 inches in its title and 27 inches in its description. If your mattress is close to either limit, verify the current listing details before placing an order.
Frequently Asked Questions
How do I know if a protector will fit my deep mattress?
Measure the mattress from bottom to top, including any topper that will remain on the bed. Compare the result with the protector’s stated pocket depth. When your measurement is close to the maximum—or the product details conflict—confirm the fit with the seller or current listing.
Is a mattress protector the same as a mattress topper?
No. A protector is mainly intended to help shield the mattress. A topper usually adds more cushioning and can change the bed’s feel. Some products combine padding with a protective layer, so check the description to understand what each one is designed to do.
Which option has the deepest stated fit?
Cozymaker’s description lists a fit up to 27 inches, but its title says up to 21 inches. PRIMESOFT also has conflicting maximum depths: 21 inches in the title and 25 inches in the description. Verify either specification on the product listing before relying on the larger number.
Are these options waterproof?
Bedsure and Cozymaker list TPU waterproof layers, and QUIETSEA and MASVIS describe waterproof protection. PRIMESOFT is described as water resistant. These claims are not identical, so review the product details if you need a specific type of liquid barrier.
Can a padded protector make my bed feel softer?
It can add a cushioned surface, especially if it has quilted layers or down-alternative fill. The amount of added softness varies by construction, and a padded product may also add bulk beneath your sheets.
Can these protectors go in the washing machine?
The supplied descriptions list machine washing for all five options, though care instructions vary. Follow the specific product directions for wash cycle and drying temperature. Several recommend gentle washing and low-heat tumble drying.
Final Recommendation
For a deep queen mattress, Bedsure is the most straightforward choice in this group if your mattress is no thicker than 22 inches and you want a quilted waterproof protector. If you want extra padding, consider QUIETSEA or MASVIS for a queen mattress up to 21 inches. King-size shoppers looking for a plusher surface can compare PRIMESOFT, while those seeking a more direct waterproof cover can look at Cozymaker—but confirm its conflicting pocket-depth specifications first.