Best California King Size Mattress Protector of 2026

Finding the best California King size mattress protector can help keep your mattress clean, comfortable and protected from spills, stains and everyday wear. This list ranks top-rated options based on user review ratings, making it easier to compare protectors by comfort, fit, durability and protection. Whether you need waterproof coverage or a breathable layer for added comfort, you can find an option that helps protect your mattress and support better zzz's.

What to look for in a California King mattress protector

The best California King mattress protector helps keep your mattress clean and comfortable while fitting securely over its larger dimensions.

1. Proper Fit

Choose a protector specifically sized for a California King mattress, which measures 72 inches wide by 84 inches long. Check the product’s pocket depth to make sure it can fit securely over your mattress and any mattress topper.

2. Waterproof Protection

A waterproof barrier can help protect your mattress from spills, sweat and other moisture. Look for a protector with reliable coverage that helps keep liquids from reaching the mattress without adding unnecessary bulk.

3. Comfort And Breathability

Select soft, breathable materials that allow airflow and help preserve the feel of your mattress. A quiet, flexible protector can also help you rest comfortably without crinkling sounds or noticeable changes to your sleep surface.

4. Care And Durability

A machine-washable protector makes it easier to maintain a clean sleep environment. Look for durable construction and care instructions that support regular washing while helping the protector maintain its shape and protective performance.

Sleepy's Signature TOTAL DEFENSE Mattress Protector

A waterproof, antimicrobial mattress protector with bamboo rayon fiber for fresh, comfortable sleep every night.

5687

best for

Temperature
Allergies

Starting at

$129⁹⁹

Save $100 when you bundle¹⁰.

Sleepy's Deluxe Comfort Cool Mattress Protector

A cooling, waterproof mattress protector with antimicrobial treatment and cushioned comfort in cal king size.

4179

best for

Temperature
Allergies

Starting at

$169⁹⁹

Save $150 when you bundle¹⁰.

Sleepy's Basics Waterproof Mattress Protector

A soft, waterproof mattress protector in cal king size that protects against stains, allergens, and dust mites.

2492

best for

Temperature
Allergies

Starting at

$69⁹⁹

Save $50 when you bundle¹⁰.

Tempur-Pedic TEMPUR-Protect Breeze Mattress Protector

A breathable, waterproof mattress protector made with cooling TENCEL Lyocell fibers and StayTight corner bands.

802

Benefits

Breathable
Cooling Technology

Starting at

$309⁰⁰

Sleepy's Signature Total Encasement Mattress Protector

A waterproof, six-sided mattress protector in white, providing complete protection against bed bugs, stains, allergens, and dust mites.

1001

best for

Temperature

Starting at

$159⁹⁹

Bedgear Dri-Tec Mattress Protector

A California King mattress protector with Dri-Tec fabric, offering waterproof, moisture-wicking, and temperature-regulating features.

150

best for

Temperature
Allergies

Starting at

$189⁹⁹

Bedgear Ver-Tex Performance Mattress Protector

A cooling mattress protector with spill protection and a secure fit for cal king beds.

162

best for

Temperature

Starting at

$299⁹⁹

Bedgear StretchWick Mattress Protector

A stretch fabric mattress protector designed to fit California King mattresses with a height of 13 inches.

155

best for

Temperature
Allergies

Starting at

$129⁹⁹

What materials are commonly used in a California king mattress protector? + -

Common materials include cotton, polyester, bamboo-derived fibers and waterproof polyurethane layers. Choose a fabric that feels comfortable and suits your preferences for softness, breathability and stretch.

How do I choose a quiet mattress protector? + -

Look for a protector made with soft, flexible fabrics and a thin waterproof layer. Quilted or fabric-backed designs can help create a smoother, quieter feel.

Are California king mattress protectors machine washable? + -

Many are machine washable, but care instructions vary by product. Follow the manufacturer’s directions for washing, drying and stain treatment to help maintain the protector’s materials.

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

Consider lightweight fabrics, moisture-managing materials and a breathable construction. A flexible design can also help the protector feel less bulky on the mattress.

How often should I wash a mattress protector? + -

Wash it whenever it becomes soiled and as part of your regular bedding routine. Using a washable cover over the protector can make day-to-day care easier.