10 Best Mattress Topper Cal King Size of 2025

Tested and Reviewed: Top 10 Mattress Topper Cal King Size deals with expert ratings from 8.1 to a perfect 10

September 2025 Edition

Editor's Choice

9.7

BedStory

BedStory Firm Mattress Topper 3 Inch Cal King - Extra Firm Memory Foam Bed Topper for Back Pain Relief - Copper Gel Bamboo Charcoal Green Tea Infused Cooling Mattress Pad - CertiPUR-US Certified

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Editor's bottom line:

“This mattress topper cal king size is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

RELIEVE PAIN & PROTECT THE SPINE - 2-layer pressure-relieving firm memory foam mattress topper conforms to your curves and distributes weight evenly to align the spine and alleviate pressure points.
2-LAYER DESIGN & OPTIONAL FIRMNESS - Featuring double-layer foam design, the top side of the mattress topper is firm, and the bottom side is extra-firm, giving you the "just right" firmness.
REMOVE MOISTURE & ALLEVIATE FATIGUE - Fusion foam contains bamboo charcoal, copper, gel, and green tea extract, which can remove moisture and absorb sweat, promote human blood circulation and metabolism, and alleviate fatigue.
COOLING & BREATHABLE EXPERIENCE - Enhanced with fluid gel-infused technology, this firm bed topper is perfect for those who tend to sweat or feel hot while sleeping. Its special ventilated design promotes air circulation, ensuring a cool and comfortable sleep environment.
NON-SLIP & HYPOALLERGENIC COVER - The high-quality cover of this mattress topper is skin-friendly and hypoallergenic. It resists pilling and static, while the four elastic straps ensure a secure fit to your main mattress, preventing any sliding.

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Picked by 292 people today

9.5

Sleep Innovations

Sleep Innovations Dual Layer 4 Inch Memory Foam Mattress Topper, California King Size, Ultra Soft Support, 3 Inch Cooling Gel Memory Foam Plus 1 Inch Fluffy Pillow Top Cover

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Main Highlights

Add this plush California King size gel memory foam mattress topper with two layers of cool cloudlike comfort; 3 inch gel memory foam plus a 1 inch pillow top cover for an all-over soft plush feel
Bedtime Made Better: This gel foam mattress topper offers plush support for all sleep positions; The fluffy pillow like cover is removable, washable, and stretches to fit your bed like a fitted sheet
Instantly Improve Any Mattress: Relieve pressure points, enjoy deeper sleep, and wake up feeling refreshed with our line of memory foam, gel memory foam, dual layer, and pillow top mattress toppers
Made In The USA: Our memory foam mattresses, mattress toppers, and pillows are all hypoallergenic and CertiPUR-US certified, offering you high quality materials for high quality sleep
Committed To Great Sleep: We invented the memory foam mattress in a box and we continue to innovate restorative foams and fabrics to give you the best night's sleep; This topper comes with a 10 year warranty

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9.5

Sleep Innovations

Sleep Innovations 3 Inch Cooling Gel Infused Memory Foam Mattress Topper, California King Size, Cool Comfort, Medium Support

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Main Highlights

Cool 3 Inch California King Size Mattress Topper: Cooling gel memory foam reduces heat and improves airflow for a cool feel and refreshing breathability; Add to your mattress for a medium feel
Durable And Responsive: Toppers offer personalized comfort and can help improve and extend the life of your mattress; Sleep better and longer as memory foam relieves pressure and provides all night support
Instantly Improve Any Mattress: Relieve pressure points, enjoy deeper sleep, and wake up feeling refreshed with our line of memory foam, gel memory foam, dual layer, and pillow top mattress toppers
Made In The USA: Our memory foam mattresses, mattress toppers, and pillows are all hypoallergenic and CertiPUR-US certified, offering you high quality materials for high quality sleep
Committed To Great Sleep: We invented the memory foam mattress in a box and we continue to innovate restorative foams and fabrics to give you the best night's sleep; This topper comes with a 5 year warranty

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9.2

Save 20%

OLANLY

OLANLY Dual-Layer 4 Inch Cal King Size Memory Foam Mattress Topper for Back Pain, 2 Inch Cooling Pillow Top Mattress Pad Cover and 2 Inch Gel Memory Foam Topper, Deep Elastic Pocket, White

20% OffFree Shipping

Main Highlights

2 In 1 Adjustable and Convenient: 4-inch dual-layer memory foam cal king mattress topper combines a 2-inch quilted pillow top mattress topper with a 2-inch gel foam mattress topper to deliver the balance of softness and support. Choose the right one according to different scenarios and needs!
Improve Sleep and Relieve Pain: Cal king size mattress topper layer conforms to your bodys natural contours, alleviating pressure on the neck, shoulders, and back. It promotes proper spinal alignment, reducing discomfort and allowing for deep, restorative sleep.
Breathable and Soft: Premium 800gsm polyester microfiber filled cooling cal king size mattress pad. The pillow top mattress pad ensures a fluffy, luxurious feel while maintaining excellent breathbility, keeping you comfortable and fresh throughout the night.
Deep Pocket Fit for Secure Placement: Cal king mattress topper features a 360° elastic skirt that fits mattresses up to 21 inches deep. It stays firmly in place, ensuring consistent comfort without slipping or shifting, even with movement during the night.
Easy Care and Maintenance: Pillow top mattress topper cover is machine washable for effortless cleaning. Simply wash in cold water and tumble dry on low. Allow 48-72 hours for the memory foam layer to fully expand and air out before use, ensuring the best sleeping experience.

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9.0

Linenspa

LINENSPA Memory Foam Mattress Topper - 3 Inch Gel Infused Memory Foam - Plush Feel - Cooling and Pressure Relieving - CertiPUR Certified - Dorm Room Essentials - California King Size

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Main Highlights

Three inches of ultra plush memory foam that conforms to your curves and hugs you to sleep; Materials: 100% Polyurethane memory foam, gel beads
Infused with temperature regulating gel beads that capture and dissipate heat to help prevent overheating
Comfortable memory foam distributes weight evenly to soften the feel of your mattress
Available in plush 2-inch and 3-inch profiles; the 3-inch topper will hug your body more than the 2-inch topper
A comfortable and affordable way to rejuvenate an old mattress, soften a hard mattress, and prolong mattress life; backed by a 3-year warranty
Dimensions: 71 inches x 83 inches x 3 inches

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8.8

Save 24%

Best Price Mattress

Best Price Mattress 3 Inch Ventilated Memory Foam Mattress Topper, Cooling Gel Infusion, CertiPUR-US Certified, Cal King, Blue

24% OffFree Shipping

Main Highlights

3-Inch memory foam topper instantly revamps old mattress for superior sleep climate
Ventilated design optimizes airflow for fresh sleep
Sleep cool with gel infusion that helps reduce trapped body heat
Responsive memory foam is engineered for ideal pressure-relieving support
CertiPUR-US certified memory foam, 3-year manufacturer's warranty
Product Note: Please allow up to 72 hours for the topper to rise

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Best Value

8.6

Save 30%

Bedsure

Bedsure California King Mattress Topper - Pillow Top Cal King Size Mattress Protector with 8-21 Inches Deep Pocket, 800 GSM Extra Thick Waterproof Bed Pad Fitted for Home, Bedroom, Hotel - White

30% OffFree Shipping

Main Highlights

BALANCED COMFORT: Our cal king mattress topper is generously filled with 800g of tested Blendtek+ fiber, expertly balancing softness and support for ultimate comfort
WATERPROOF: The TPU waterproof layer effectively protects your mattress, The innovative design offers superior protection against spills and accidents, ensuring your mattress stays dry and clean
360° BREATHABILITY: Features a five-layer structure with mesh fabric all around, to ensure breathability and softness, keeping you cool and comfortable throughout the night
EASY TO USE: Boasting a 21-inch deep pocket with stretchy elastic bands for a snug fit, your cal king size mattress topper stays securely in place without slipping or sliding. Its cozy quilted box design keeps the filling evenly distributed to prevent shifting
USAGE TIPS: Simply machine wash and dry. For best results, place the top layer facing outward and the waterproof layer inward. It's so easy to care that practical choice for everyday use

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8.3

Save 28%

oaskys

Cal King Mattress Pad Cover Cooling Mattress Topper Pillow Top with Down Alternative Fill (8-21”Fitted Deep Pocket California King Size)

28% OffFree Shipping

Main Highlights

Comfortable and Soft:Filled with 4D down alternative,gives superior comfort against your skin without extra heat and sweat.The down alternative filling has the feel of authentic goose and down,which is more comfortable and soft.
Fluffy and Supportive:The optimum thickness of our mattress pads provide a perfect balance between softness and support.The Skin-friendly top cover improves the texture of the bed and the quality of a luxurious night's sleep effectively.
Cooling and Breathable:The top layer of mattress topper is made of premium ultra-soft,fresh and breathable microfiber,which could keep your skin cozy and cool.The premium down alternative filling improves airflow and dissipates heat, making it extremely comfortable and soft.The fluffy topper provides an extra layer of softness for enhanced sleep.
Convenient:Our bed topper is equipped with a 360°all-around elastic skirt,4 no-slip elastic anchor bands wrapping the mattress tightly.The deep pockets perfectly fits and grips any mattress up to 21".
Machine Washable:Our mattress topper is MACHINE WASHABLE.Tumble dry it on low heat before use to fluff it up.

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8.1

MATBEBY

MATBEBY California King Mattress Pad - Cooling Breathable Mattress Topper, Quilted Fitted Mattress Protector, Pillow Top Mattress Cover with 8-21" Deep Pocket, Soft, Machine Washable, White, Cal King

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Main Highlights

Soft & ComfortableEnjoy comfort and softness with Matbeby california king size mattress pad(72"x84"), featuring premium polyester microfiber filling for optimal relaxation. It not only enhances your sleep experience but also protects your mattress from stains and wear, ensuring it stays clean and in excellent condition for longer.
Cooling & BreathableOur cal king mattress topper features a unique breathable design that promotes airflow, keeping you cool and comfortable throughout the night.
Deep Pocket FitQuilted mattress protector snugly fits mattresses up to 21" deep. The all-around elastic edging ensures a snug and secure fit - no slipping or bunching, no matter how much you toss and turn.
Easy to Care ForEnjoy hassle-free cleaning with our mattress cover. It's machine washable, wrinkle-resistant, and quick to dry, save time and effort. Tips: under gentle cycle with cold water, tumble dry low. Please DO NOT iron, DO NOT dry clean.
Versatile & DurableAvailable in multiple sizes. Our mattress pad cover is perfect for homes, dorms, RVs, or guest rooms durable enough for years of comfort.

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8.1

Save 13%

Bedsure

Bedsure California King Mattress Protector - Cal King Mattress Pad Topper with 8-21 Inches Deep Pocket, Quilted Fitted Soft Bed Cover Padded, White, 72x84 Inches

13% OffFree Shipping

Main Highlights

Ergonomic Design: This Bedsure california king mattress protector (72x84 Inches) features an ergonomic three-zone design. The top and bottom zones feature a softer wavy design for improved relaxation. The honeycomb-shaped middle quilting provides evenly distributed support that disperses the bodys pressure. Designed to upgrade your stiff mattress to a restorative sleeping space
Optimal Comfort: Featuring Bedsure's signature thoroughly tested polyester microfiber filling blend, this california king mattress topper offers extra softness and optimal support for the ideal balance of comfort and firmness
Soft to The Touch: The premium polyester microfiber cover is finely brushed to achieve a satisfyingly soft hand-feel without crinkly noise, providing you with a deep and restful nights sleep
Deep Pocket: This cal king mattress pad can be easily stretched up to 21" deep, and the all-around elastic edging effortlessly secures the california king mattress cover in place without moving or shifting
Enhanced Durability & Easy Care: Thanks to the premium polyester microfiber cover and neat stitching, the cal king mattress cover offers improved durability to withstand wear and tear. Machine wash separately in cold water on a gentle cycle and tumble dry low

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Our Best Overall Choice

Best Choice

9.7

BedStory

BedStory Firm Mattress Topper 3 Inch Cal King - Extra Firm Memory Foam Bed Topper for Back Pain Relief - Copper Gel Bamboo Charcoal Green Tea Infused Cooling Mattress Pad - CertiPUR-US Certified

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

RELIEVE PAIN & PROTECT THE SPINE - 2-layer pressure-relieving firm memory foam mattress topper conforms to your curves and distributes weight evenly to align the spine and alleviate pressure points.
2-LAYER DESIGN & OPTIONAL FIRMNESS - Featuring double-layer foam design, the top side of the mattress topper is firm, and the bottom side is extra-firm, giving you the "just right" firmness.
REMOVE MOISTURE & ALLEVIATE FATIGUE - Fusion foam contains bamboo charcoal, copper, gel, and green tea extract, which can remove moisture and absorb sweat, promote human blood circulation and metabolism, and alleviate fatigue.
COOLING & BREATHABLE EXPERIENCE - Enhanced with fluid gel-infused technology, this firm bed topper is perfect for those who tend to sweat or feel hot while sleeping. Its special ventilated design promotes air circulation, ensuring a cool and comfortable sleep environment.
NON-SLIP & HYPOALLERGENIC COVER - The high-quality cover of this mattress topper is skin-friendly and hypoallergenic. It resists pilling and static, while the four elastic straps ensure a secure fit to your main mattress, preventing any sliding.

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