King Size Protectors

Find King Size Protectors to complement your sleep setup and help you care for your mattress. Explore options in a range of styles and price points to find the right fit for your bedroom.

Sleepy's Signature TOTAL DEFENSE Mattress Protector

6052

Starting at

$129⁹⁹

Temperature
Allergies

Save $100 when you bundle¹⁰.

Sleepy's Deluxe Comfort Cool Mattress Protector

4494

Starting at

$189⁹⁹

Temperature
Allergies

Save $150 when you bundle¹⁰.

Sleepy's Basics Waterproof Mattress Protector

2670

Starting at

$69⁹⁹

Temperature
Allergies

Save $50 when you bundle¹⁰.

Sleepy's Signature Total Encasement Mattress Protector

1030

Starting at

$159⁹⁹

Temperature

Bedgear Dri-Tec Mattress Protector

156

Starting at

$189⁹⁹

Temperature
Allergies

Bedgear Ver-Tex Performance Mattress Protector

176

Starting at

$299⁹⁹

Temperature

Bedgear StretchWick Mattress Protector

164

Starting at

$129⁹⁹

Temperature
Allergies

Allerease Maximum Pillow Protector

172

Starting at

$19⁹⁹

Allerease Ultimate Mattress Protector

339

Starting at

$49⁹⁹

Temperature
Allergies

Sleepy's Signature Antimicrobial Pillow Protector

Starting at

$39⁹⁹

Tempur-Pedic TEMPUR-Protect Breeze Mattress Protector

832

Starting at

$309⁰⁰

Tempur-Pedic TEMPUR-Cloud Mattress Topper

683

Starting at

$214⁰⁰

Medium Comfort,

Temperature
Allergies

Tulo Gel Memory Foam Zoned Support Mattress Topper

128

Starting at

$107⁹⁹

$159⁹⁹

$52 OFF

Medium Comfort,

Temperature

Sleepy's 4" Reversible Gel Memory Foam Topper

Starting at

$199⁹⁹

$299⁹⁹

$100 OFF

Medium Comfort,

Temperature
Allergies

Tempur-Pedic TEMPUR-Adapt + Cooling Mattress Topper

4737

Starting at

$349⁰⁰

$509⁰⁰

$160 OFF

Medium Comfort,

Temperature
Allergies

King size mattress protectors help preserve the comfort and condition of a larger bed while creating a clean, practical layer between the sleeper and the mattress. A standard king mattress measures 76 inches wide by 80 inches long, although mattress thickness can vary considerably, so checking the protector’s dimensions and pocket depth is an important first step. A protector that is too shallow may pull away from the corners, while one that is too loose can shift beneath the sheets and create uncomfortable bunching. Many fitted styles stretch to fit mattresses around 18–21 inches deep, but the best match depends on the mattress, any topper in use and the height of the bed’s existing layers. California King mattresses have different dimensions and require a California King protector rather than a standard king size protector. For an easier shopping experience, compare the mattress measurements with the listed size, pocket depth and fit details before choosing. Shoppers exploring different materials, construction types and price points can also browse the Best King Size Mattress Protector collection for additional ideas.

The right protector can be especially useful for households with children, pets or anyone who enjoys breakfast in bed, as well as sleepers who perspire during the night. Everyday moisture from sweat, accidental spills and damp towels can gradually reach a mattress without a protective barrier, leaving behind odors or stains that are difficult to remove. Waterproof king size protectors typically use a liquid-resistant backing, often made with TPU, to help block spills while keeping the surface flexible and quiet. Look for a breathable top layer if temperature regulation matters, since a soft cotton blend, bamboo-derived fabric or other moisture-managing material may feel more comfortable during warmer nights. Quilted surfaces can add a little cushioning and texture beneath the sheets, while smooth, lightweight designs may suit sleepers who prefer to feel the mattress more directly. A protector should not noticeably change the support of a well-chosen mattress, but it can help keep the sleep surface feeling fresher through daily use. For homes with allergies or sensitivities, a tightly woven cover may help reduce the buildup of dust and other common irritants, especially when it is washed regularly. A fitted, five-sided style covers the top and sides of the mattress and is generally simple to remove for laundering. A six-sided zippered encasement surrounds the mattress more completely and may be worth considering when comprehensive coverage is a priority, including in shared bedrooms, guest rooms or spaces where pets spend time.

King size protectors are also thoughtful gifts for someone setting up a primary bedroom, moving into a new home or preparing a guest room. They are useful alongside new sheets, pillows and other bedding because they protect the mattress from the first night onward, before small spills or everyday wear have a chance to become lasting problems. In a guest room, a washable protector offers reassurance between visitors and makes turnover easier when the weather warms or during the cooler months, when bedrooms may be closed up for longer periods. For families, keeping a spare protector on hand can make middle-of-the-night changes less stressful: remove the soiled layer, replace it with a clean one and return to the rest of the bedtime routine. Care instructions vary, so check the label for washing temperature, drying recommendations and whether bleach or fabric softener should be avoided. High heat may damage waterproof coatings, while rough treatment can affect elastic edges and seams. It is also wise to let a protector dry completely before putting it back on the mattress, since trapped moisture can create an unpleasant environment beneath the sheets. Consider how the protector feels, how securely it fits, how easily it can be cleaned and which areas of the mattress need coverage. With the right combination of size, materials and construction, a king size protector can help maintain a more comfortable, cleaner-feeling sleep space for years of everyday rest.

What materials are commonly used in king size mattress protectors? + -

Common materials include cotton, polyester, rayon from bamboo and blends. Some protectors also feature quilted fabric, breathable layers or a soft stretch skirt.

How should I wash a king size mattress protector? + -

Follow the care instructions on the product label. Many protectors can be machine washed with mild detergent and tumble dried on a low setting.

What features should I look for in a king size mattress protector? + -

Consider the cover material, cushioning, breathability, stretch, noise level and care requirements. Choose features that match your comfort preferences and bedroom routine.

Can a king size mattress protector be used with a mattress pad? + -

Yes, a mattress protector can typically be layered with a mattress pad. Place the protector directly over the mattress, then add the mattress pad above it.

How often should I clean a king size mattress protector? + -

Clean it according to the care label and your household routine. Washing it whenever you launder your sheets can help keep your bedding fresh.