Best Cooling Mattress Topper for Nectar California King in 2025
Updated on July 2025
#1
Recommended
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- 365-NIGHT HOME MATTRESS TRIAL - Our industry-leading year-long trial period starts the day your Nectar mattress is delivered. Sleep on it in all four seasons before you decide.
- SIMPLE TO SET UP - Just move the box to the room you want to use it in, unbox and unroll your mattress, and watch it expand before your eyes. Your Nectar will be snooze ready in 24 hours!
- 4X MORE COOLING - Step up from our Classic model with four times more cooling fibers, plus temperature regulating phase change material, to ensure an even more refreshing sleep experience.
- 4X MORE PRESSURE RELIEF - With 4 extra inches of contouring memory foam than our Classic Model, plus a zoned ergonomic support layer, you can expect even more relief for your back and hips.
- PERFECT SUPPORT FOR ANY POSITION - Whether you're a side sleeper, back sleeper, stomach sleeper, or somewhere in between, Nectar offers the optimal level of firmness, coolness, breathability, and comfort.
- SAFE & FIBERGLASS FREE - Your Nectar mattress is made without ozone depletors, mercury, lead, formaldehyde, phthalates and other harmful substances that can be in consumer products
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- 365-NIGHT HOME MATTRESS TRIAL - Our industry-leading year-long trial period starts the day your Nectar mattress is delivered. Sleep on it in all four seasons before you decide.
- SIMPLE TO SET UP - Just move the box to the room you want to use it in, unbox and unroll your mattress, and watch it expand before your eyes. Your Nectar will be snooze ready in 24 hours!
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#2
Value for Money
13% Off
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- Unmatched Comfort & Support: Experience the ultimate in sleep luxury with our mattress topper california king. At 300% thicker than mattress pads, it is filled with 900 GSM of plush material, ensuring a cloud like comfort that supports every sleep position. Our advanced fill technology adapts to your body, providing relief for back pain and a restful night’s sleep.
- Stay Cool All Night: Say goodbye to hot, restless nights. Our cooling california king topper features 100% cooling rayon fabric, known for its breathability and moisture wicking properties. The silky soft material of this mattress topper california king size ensures you stay cool and dry, making it perfect for hot sleepers and those with foam mattresses.
- Optimal Softness for Pain Relief: Our california king pillow top mattress topper adds just the right amount of softness without compromising support. The plush fill contours to your body, easing pressure points and providing the perfect balance for back pain relief, ensuring you wake up refreshed and pain free.
- Secure Fit & Easy Maintenance: Designed to fit like a glove, our thick california king cooling mattress topper (72” W x 84” L) features a 360° stretchable drop that fits up to 20” deep pocket mattresses and stays securely in place throughout the night. Easily washable at home in your standard size washer/dryer, it fluffs right back up after machine wash and dry, ensuring continuous comfort.
- Why Choose Us? We engineer our products to the highest standards, benchmarking against top products worldwide. We stand behind our quality with a commitment to resolve any issues within 1 business day. Discover sustainable bedding and experience the difference in your sleep quality.
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- Unmatched Comfort & Support: Experience the ultimate in sleep luxury with our mattress topper california king. At 300% thicker than mattress pads, it is filled with 900 GSM of plush material, ensuring a cloud like comfort that supports every sleep position. Our advanced fill technology adapts to your body, providing relief for back pain and a restful night’s sleep.
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#3
32% Off
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- Breathable gel-infused memory foam designed for optimal comfort and support
- ThermaGel technology promotes a cooler sleep experience
- Conforms to the body's contours for improved support
- Improves mattress longevity and sleep quality
- Manufactured in the USA
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- Breathable gel-infused memory foam designed for optimal comfort and support
- ThermaGel technology promotes a cooler sleep experience
- Conforms to the body's contours for improved support
- Improves mattress longevity and sleep quality
- Manufactured in the USA
#4
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- California King Size 4 Inch Cooling Mattress Topper includes a 2 inch cooling fiberfill cover and a 2 inch gel memory foam layer, enhancing mattress longevity.
- Gel memory foam topper provides medium plush support for all sleep positions and features a removable, machine washable cover that fits like a fitted sheet.
- Instantly enhances mattress comfort by relieving pressure points and promoting deeper sleep.
- All products are made in the USA, hypoallergenic, and CertiPUR-US certified for safe and high-quality sleep materials.
- Our commitment to quality sleep includes innovative memory foam technologies, backed by a 10 year warranty.
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- California King Size 4 Inch Cooling Mattress Topper includes a 2 inch cooling fiberfill cover and a 2 inch gel memory foam layer, enhancing mattress longevity.
- Gel memory foam topper provides medium plush support for all sleep positions and features a removable, machine washable cover that fits like a fitted sheet.
- Instantly enhances mattress comfort by relieving pressure points and promoting deeper sleep.
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#5
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- Memory foam conforms to your body, providing tailored support for pressure points while keeping your spine aligned to enhance sleep comfort.
- Cooling gel technology helps regulate temperature by absorbing heat and promoting airflow, reducing night sweats and improving sleep quality.
- Features an anti-slip bottom and adjustable retention strap to keep the topper securely in place, with a removable and washable cover for easy cleaning.
- Made with CertiPUR-US certified memory foam and OEKO-TEX certified materials, ensuring safety and skin-friendliness without harmful chemicals.
- Extends the lifespan of your mattress and offers added comfort without significantly altering firmness with a 2-inch thickness.
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- Memory foam conforms to your body, providing tailored support for pressure points while keeping your spine aligned to enhance sleep comfort.
- Cooling gel technology helps regulate temperature by absorbing heat and promoting airflow, reducing night sweats and improving sleep quality.
- Features an anti-slip bottom and adjustable retention strap to keep the topper securely in place, with a removable and washable cover for easy cleaning.
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#6
14% Off
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- California King Mattress Pad measuring 72x84 inches with a 21-inch deep pocket and made of 62 oz elastic and hollow down alternative microfiber.
- Provides enhanced softness with 30 oz down alternative fillings, making firm mattresses more comfortable.
- Features a 300TC cotton surface that absorbs moisture and is breathable; filled with down alternative material.
- Designed as a fitted sheet with a deep pocket that accommodates mattresses up to 21 inches, utilizing 130GSM single-track elastic fabric to prevent bunching.
- Can be machine washed on a gentle cycle; retains fluffiness when dried in sunlight.
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- California King Mattress Pad measuring 72x84 inches with a 21-inch deep pocket and made of 62 oz elastic and hollow down alternative microfiber.
- Provides enhanced softness with 30 oz down alternative fillings, making firm mattresses more comfortable.
- Features a 300TC cotton surface that absorbs moisture and is breathable; filled with down alternative material.
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#7
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- 3-inch California King size mattress topper designed with cooling gel memory foam for enhanced airflow and temperature regulation
- Durable memory foam offers personalized comfort and support for extended mattress life and pressure relief
- Improves any mattress by alleviating pressure points for deeper sleep and refreshed mornings; available in various types including gel and dual-layer
- Hypoallergenic materials with CertiPUR-US certification ensure quality and safety; made in the USA
- Innovative memory foam technology backed by a 5-year warranty for reliable quality and comfort
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- 3-inch California King size mattress topper designed with cooling gel memory foam for enhanced airflow and temperature regulation
- Durable memory foam offers personalized comfort and support for extended mattress life and pressure relief
- Improves any mattress by alleviating pressure points for deeper sleep and refreshed mornings; available in various types including gel and dual-layer
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#8
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- 1000GSM premium loft for enhanced comfort and softness, ensuring excellent support and cushioning.
- Viscose made from bamboo fabric for breathability and heat distribution, preventing overheating during sleep.
- Elastic deep pocket fitted skirt accommodates mattress depths of 8-21 inches, keeping the topper securely in place.
- Easy to clean: machine washable for convenient maintenance without the need for costly dry cleaning.
- Customer satisfaction guaranteed with options for fluffing and responsive support for any order issues.
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- 1000GSM premium loft for enhanced comfort and softness, ensuring excellent support and cushioning.
- Viscose made from bamboo fabric for breathability and heat distribution, preventing overheating during sleep.
- Elastic deep pocket fitted skirt accommodates mattress depths of 8-21 inches, keeping the topper securely in place.
- Easy to clean: machine washable for convenient maintenance without the need for costly dry cleaning.
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#9
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- California King Mattress Pad (72''x84'') with soft polyester top and a new polyester filling design (50% 3D, 50% 6D) for enhanced comfort and support.
- Cooling polyester top layer promotes breathability and circulation, ensuring a comfortable sleeping environment without excess heat.
- Unique quilted design provides improved support and durability, with quick-drying and wrinkle-resistant properties.
- Deep pocket design accommodates mattresses from 8" to 21" thick, ensuring a secure fit without movement during sleep.
- Easy care: Machine washable on gentle cycle; tumble dry low, do not iron or dry clean.
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- California King Mattress Pad (72''x84'') with soft polyester top and a new polyester filling design (50% 3D, 50% 6D) for enhanced comfort and support.
- Cooling polyester top layer promotes breathability and circulation, ensuring a comfortable sleeping environment without excess heat.
- Unique quilted design provides improved support and durability, with quick-drying and wrinkle-resistant properties.
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#10
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- Mattress pad utilizes NANOTEX Coolest Comfort Technology for moisture-wicking and temperature balance, enhancing breathability with a stylish embossed surface.
- Constructed from 120gsm thick brushed microfiber and overfilled with 12oz 5D spiral fiber, offering superior softness and fluffiness reminiscent of luxury hotel bedding.
- Ergonomically designed with a unique 3-zone layout: wavy head and foot areas prevent deformation, while a cloud-shaped quilting in the middle provides support and pressure distribution for natural body alignment.
- Features a deep pocket design (8"-21") with a knitted skirt that ensures a secure fit on most mattresses and is easy to place and remove, allowing for convenient care and maintenance.
- Backed by over 40 years of experience in high-quality bedding design and manufacturing, with Oeko-Tex certification for confidence in product quality.
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- Mattress pad utilizes NANOTEX Coolest Comfort Technology for moisture-wicking and temperature balance, enhancing breathability with a stylish embossed surface.
- Constructed from 120gsm thick brushed microfiber and overfilled with 12oz 5D spiral fiber, offering superior softness and fluffiness reminiscent of luxury hotel bedding.
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