Best 8-Inch California King-Size Mattresses


Our review process

We've already done all the grunt work researching 8-inch California king-size mattresses. That way, you don't have to pour over confusing articles about selecting the right one for you. By reading this article, you'll have an excellent understanding of what kinds of mattresses are available on the market, so you can confidently purchase a mattress that will ensure comfortable sleep for years to come.

Before deciding on your next 8-inch California king-size mattress, there's some stuff you'll want to know. These California king-size mattresses measure 72" X 84" and are perfect for master bedrooms. With extra length, they are ideal for taller adults. They are perfect for couples, offering plenty of space for you to move around. However, they are large and heavy, making them hard to transport and flip. In addition, California king-size mattresses are not great for areas with limited room, making small rooms look somewhat cluttered.

8-inch mattresses are less likely to sag, so the surface will remain flat to ensure adequate support over time. Featuring a standard thickness, they will conveniently fit in most bed frames. However, they provide less support than other types of mattresses, so if you suffer from back or joint pain, then you should consider a thicker mattress. Additionally, they wear out quickly, so you will have to replace them more frequently.

Best Overall Score
An image of Comfort Memories F03-00015-CK0 Soft Memory Foam California King-Size 8-Inch Mattress

If you want to ensure that you don't wake up with back pain, the Comfort Memories Soft Memory Foam California King-Size Mattress could be an excellent option. Available in a California king-size, this Comfort Memories mattress offers additional space from top to bottom. It features a soft comfort level, which is ideal for people who sleep on their side as it better cushions the hips and shoulders. Featuring an 8-inch thickness, this Comfort Memories mattress provides you with a sturdy sleeping surface that won't sag over time.

Featuring a memory foam construction, this Comfort Memories mattress accommodates every possible sleeping position. It has three layers, working together to ensure both comfort and support. This Comfort Memories mattress features memory foam and support foam layers. It is made to eliminate motion transfer, making it great for restless sleepers. Featuring antimicrobial materials, this Comfort Memories mattress stands up to any toxic bacteria.

    Pros
    • Soft mattress prevents pressure by balancing your body weight without having your back or joints sink
    • Antimicrobial benefits provide a healthier sleep area
    • Reduces motion transfer, making it ideal for restless sleepers
    Cons
    • California king-size reduces the amount of horizontal sleeping space
    • 8-inch thickness doesn't provide the best support
    • Memory foam construction releases unpleasant odors
Runner Up
An image of Comfort Dreams M-085351 Memory Foam California King-Size 8-Inch Mattress

Are you searching for a mattress that will give you better support for both your upper and lower body? You might want to consider purchasing the Comfort Dreams Memory Foam California King-Size Mattress. This Comfort Dreams mattress features a memory foam construction, letting you toss and turn and then re-contours to your body after you've settled. Featuring antimicrobial fibers, it fights against any dangerous bacteria. It eliminates motion transfer, which makes it perfect for restless sleepers since any movement stays isolated.

This Comfort Dreams mattress has an 8-inch thickness, which provides a level and sturdy sleeping surface. Available in a California king-size, it will reduce the width of sleeping space. It is suitable to use for standard box springs, platform beds, and boxed mattresses. Easy to transport, it adds even more convenience for when moving or rearranging the room. It is dust mite resistant, minimizing your exposure to allergens.

    Pros
    • Features antimicrobial materials, preventing bacteria, mold, and dust mites from spreading
    • Eliminates motion transfer, making it ideal for light sleepers
    • Made with pressure point relief technology to improve comfort and alleviate pain
    Cons
    • California king-size reduces the width of sleeping space
    • 8-inch thickness provides less support than thicker mattresses
    • Memory foam construction releases VOCs
Additional Picks
An image of Continental Sleep 9000-6/6cal-1 Firm Foam California King-Size VertiCoil Innerspring Unit 8-Inch Mattress

For optimal comfort and a restful night's sleep, consider the Continental Sleep Firm Foam California King-Size Mattress. This orthopedic mattress features an 8-inch thickness, so the mattress won't dip in the center or collapse on the sides. It features a firm comfort level, so your body will maintain good posture in order to keep your back from curving. It is fire resistant, which is a safe option for your bedroom. Available in a California king-size, this orthopedic mattress offers four extra inches in length, so it's ideal for taller individuals.

This orthopedic mattress features a foam construction, altering to fit your body shape. Featuring a VertiCoil innerspring core, it has a more durable perimeter and great orthopedic support. This orthopedic mattress helps eliminate tossing and turning at night, which improves the quality of your sleep. It features pressure point relief technology, so any pain is diminished because of crucial joint support.

    Pros
    • Firm mattress provides superior support to prevent the body from sinking
    • VertiCoil innerspring core increases its durability while also reducing sagging
    • Helps eliminate tossing and turning at night, significantly improving your quality of sleep
    Cons
    • California king-size reduces the width of sleeping space
    • Firm mattress can put uncomfortable pressure on pressure points
    • 8-inch thickness wears faster than other thicker mattresses
An image of TFS Soft Pocketed Coil California King-Size 8-Inch Mattress

Do you get overheated at night? Consider the TFS Soft Pocketed Coil California King-Size Mattress. Available in a California king-size, this organic mattress offers additional space from bottom to top. With a design that conforms to your body, it provides the correct amount of support and comfort. Made with pressure point relief technology, it helps to relax stressed muscles and joints. It features a soft comfort level, making it suitable for those who sleep on their side as it better cushions the hips and shoulders. Featuring an 8-inch thickness, this organic mattress provides you with a sturdy sleeping surface that won't sag over time.

This organic mattress reduces the environmental impact due to it being built with sustainable materials. With a ventilated design, this TFS mattress encourages airflow and controls moisture. Featuring a pocketed-coil construction, it provides optimal comfort because it decreases pressure points. Featuring a chemical-free cover, this TFS mattress is a healthy, non-toxic option for your home.

    Pros
    • Soft mattress is perfect for those who enjoy sleeping on their sides
    • Conforms to your body for maximum comfort and support
    • Provides pressure point relief, making it suitable for those who sleep on their stomach
    Cons
    • Comes in a California king-size, reducing the width of sleeping space
    • 8-inch thickness doesn't provide the best support
    • Pocketed-coil construction can accumulate dust more easily
An image of OSleep Firm Hybrid California King-Size 8-Inch Mattress

Want to go the eco-friendly route? Consider the OSleep Firm Hybrid California King-Size Mattress. With antimicrobial fabric, this OSleep mattress fights against any toxic bacteria. It features a firm comfort level, giving better balance to pressure areas that we tend to stress. This OSleep mattress helps eliminate tossing and turning at night, which improves the quality of your sleep. It has an 8-inch thickness, which will keeps its shape even with extra weight. Available in a California king-size, it provides additional room from top to bottom.

This OSleep mattress has a hybrid construction, which can be heavy and cumbersome to move around or store. Made with eco-friendly materials, it doesn't contain toxic chemicals that negatively affect the environment and your health. It features a quilted cover, which stretches to fit a large mattress perfectly. With resistance to dust mites, it makes it a suitable option for those who suffer from allergies.

    Pros
    • Firm mattress encourages a deeper sleep
    • Features antimicrobial fabric, making it great for people who are allergic to pollen, dust mites, or mold
    • Helps eliminate tossing and turning at night, significantly improving your quality of sleep
    Cons
    • Comes in a California king-size, reducing the amount of horizontal sleeping space
    • Firm mattress can put uncomfortable pressure on pressure points
    • 8-inch thickness doesn't provide the best support
An image of Primo International 32378 Soft Memory Foam California King-Size 8-Inch Mattress

For a better night's sleep and endless comfort, choose a Primo International Soft Memory Foam California King-Size Mattress. This Primo International mattress offers pressure point relief, decreasing tossing and turning at night. Designed to conform to your body, it can help alleviate pressure in sensitive parts of the body. This Primo International mattress features a memory foam construction, letting you move around in your sleep and then re-contours to your body after you've found a comfortable position.

Available in a California king-size, this Primo International mattress offers additional room from bottom to top. It is built with a polyester cover, which is a more affordable and stronger alternative to cotton. It features a soft comfort level, making it perfect for those who sleep on their side as it better cushions the hips and shoulders. It features an 8-inch thickness, stopping your mattress from dipping in the center or collapsing around the edges. This Primo International mattress features a quilted cover, providing added comfort and cushioning.

    Pros
    • Soft mattress is great for people who naturally sleep on their sides
    • Features a polyester cover, resisting wrinkles and fading over time
    • Conforms to your body, increasing its overall comfort and support
    Cons
    • California king-size reduces the width of sleeping space
    • 8-inch thickness provides less support than thicker mattresses
    • Memory foam construction can make it hard to get out of bed for some
An image of Sommette Firm Gel Memory Foam California King-Size 8-Inch Mattress

The Sommette Firm Gel Memory Foam California King-Size Mattress is best for those looking for an allergen-free mattress. This Sommette mattress is resistant to dust mites, so your sleeping space will be allergy and pest-free. Featuring a hypoallergenic design, it is perfect for those who have allergies or skin sensitivities. Available in a California king-size, it offers four extra inches in length, making it great for taller individuals. It features an 8-inch thickness, so your mattress will not dip in the center or fall on the sides. It has a firm comfort level, so your body will maintain good posture in order to prevent your back from curving. This hypoallergenic mattress has a gel memory foam construction, which draws heat away from the sleeper due to its better air circulation. With antimicrobial benefits, it prevents the growth and dispersal of bacteria.

    Pros
    • Firm mattress will provide the support needed to keep your body straight
    • Features antimicrobial fibers, making it ideal for people who are allergic to mold, dust mites, or pollen
    • Helps eliminate tossing and turning at night, drastically improving your quality of sleep
    Cons
    • Comes in a California king-size, reducing the amount of horizontal sleeping space
    • Firm mattress can put uncomfortable pressure on pressure points
    • 8-inch thickness doesn't provide the most support
An image of Coaster Home Furnishings Memory Foam California King-Size Foam Base 8-Inch Mattress

Are you easily hot at night? The Coaster Home Furnishings Memory Foam California King-Size Mattress might be a good choice for you. With a memory foam construction, this hypoallergenic mattress lets you toss and turn and then re-contours to your body after you've settled. It provides pressure point relief, which is especially important for those who sleep on their stomach. It has a supportive design, aligning your spine horizontally when sleeping on your side.

This Coaster Home Furnishings mattress features an 8-inch thickness, which can withstand additional weight without sagging. Available in a California king-size, it offers four extra inches in length, so it's great for taller people. It has a washable cover, keeping it free from dirt or stains for a long time. It features a removable cover, making it easy to change and clean. With a foam base, it sufficiently supports all main pressure areas of your body. Featuring a hypoallergenic design, it is excellent for those who suffer from allergies or skin sensitivities. It features a ventilated design, encouraging airflow to keep you cool and relaxed during the night. It is dust mite resistant, making it a suitable choice for those who suffer from allergies.

    Pros
    • Foam base supports each part of the body evenly and individually by spreading your weight across the mattress
    • Supportive design ensures proper spinal support and alignment
    • Offers pressure point relief, ensuring your spine and joints are well supported in order to help with any discomfort
    Cons
    • California king-size reduces the width of sleeping space
    • 8-inch thickness provides less support than thicker mattresses
    • Memory foam construction releases VOCs
An image of TFS Soft Latex Foam California King-Size 8-Inch Mattress

For a better night's sleep and ultimate comfort, select a TFS Soft Latex Foam California King-Size Mattress. This TFS mattress has a supportive design, ensuring proper spinal support and alignment. With a latex foam construction, it will naturally resist mold and dust mites. Available in a California king-size, this TFS mattress offers four extra inches in length, making it ideal for taller individuals. It features a cotton cover, keeping you cool during the summer and warm during the winter. It has a soft comfort level, which provides an ideal surface for those who sleep on their side as it better cushions the hips and shoulders. This TFS mattress features an 8-inch thickness, so your mattress will not dip in the center or collapse on the sides.

This organic mattress has a quilted cover, providing added comfort and cushioning. With a chemical-free cover, it is a healthy, non-toxic option for your home. Featuring a jacquard cover, this TFS mattress gives your mattress a more luxurious feel. This mold-resistant TFS mattress will absorb humidity without supporting mold growth. With resistance to dust mites, it makes it a good option for those suffering from allergies.

    Pros
    • Soft mattress prevents pressure by balancing your body weight without having your back or joints sink
    • Comes with a cotton cover, keeping you warm during the winter and cool during the summer
    • Supportive design ensures proper spinal support and alignment
    Cons
    • California king-size reduces the amount of horizontal sleeping space
    • 8-inch thickness doesn't provide the most support
    • Latex foam construction might feel too "spongy" for some
An image of Sierra Sleep by Ashley I800 M99551 Memory Foam California King-Size 8-Inch Mattress

For a good night's rest and ultimate comfort, choose a Sierra Sleep by Ashley I800 Memory Foam California King-Size Mattress. Available in a California king-size, this Sierra Sleep by Ashley mattress offers additional room from top to bottom. It has an 8-inch thickness, preventing the mattress from dipping in the center or falling on the sides. It features a memory foam construction, letting you move around in your sleep and then re-contours to your body after you've settled. This Sierra Sleep by Ashley mattress has a supportive design, ensuring proper spinal support and alignment.

    Pros
    • Supportive design ensures proper spinal support and alignment
    • California king-size is ideal for tall people looking to find a comfortable bed that fits them
    Cons
    • California king-size reduces the width of sleeping space
    • 8-inch thickness provides less support than thicker mattresses
    • Memory foam construction can make it hard to get out of bed for some
8-Inch California King-Size Mattresses: Here's Some More Information To Think About:
The Comfort Scale
Firm Mattresses

If you're considering a firm mattress, an 8-inch California king-size mattress might be a good choice for you. Increasing circulation, these mattresses promote deeper sleep. They distribute your weight properly, adequately supporting your back and joints and other sensitive areas. These mattresses have a 34-36 pound indentation load deflection ranking and are suitable for individuals who sleep on their back. However, they can put painful tension on specific pressure points, including the shoulders and hips. Another downside is that they can be uncomfortable if you're not used to sleeping on hard surfaces, so it can take some time to get used to them.

Luxury Firm Mattresses

Not sure if you should get a luxury firm mattress? We can help you make your decision by giving you some information that you need. Luxury firm mattresses are ideal for couples where one individual who enjoys to sleep on their stomach and the other on their side or back. They have an indentation load deflection rating of 29-31 pounds and are a great choice for individuals who move from their back to sides when sleeping. They distribute your weight properly, supporting your back and other sensitive areas. However, these mattresses are less durable than memory foam mattresses, lasting between 7-10 years at most. On top of that, they provide less support than other mattresses, so you should avoid this type of mattress if you have back discomfort. Feel ready to pick out the right 8-inch California king-size mattress for you? You can get started here.

Plush Mattresses

If you're trying to decide on a plush mattress, an 8-inch California king-size mattress might be a good choice for you. These mattresses have a 19-21 pound indentation load deflection ranking and are suitable for those who usually sleep on their back, sides, or stomach. With extra support, they are ideal for those who suffer from back problems or joint pain. These contouring support mattresses adjust to your body shape for enhanced comfort. One downside is that they can become lumpy or sag with extended use, so your body won't be properly supported while sleeping. On top of that, they may be problematic if different sleepers will be using the bed, causing the surface to sag if there is a drastic weight difference.

Choosing Your Mattress Type
Gel Memory Foam Mattresses

If you're thinking about getting a gel memory foam mattress, this 8-inch California king-size mattress could be a good choice for you. With pressure-point relief, these mattresses adequately support your shoulders and hips in any sleeping position. They are made of various materials, giving you a wide range of foam densities to choose from. They feature a breathable design, which extends the lifespan of the mattress by allowing air to circulate freely. Distributing your weight evenly across the mattress, they stop your shoulders and hips from sinking into the mattress. They feature innovative, superior motion isolation, so your partner's movements won't wake you up.

Hybrid Mattresses

If you want a hybrid mattress, this 8-inch California king-size mattress could be a good choice for you. Hybrid mattresses are good at dissipating heat, regulating a comfortable sleep temperature. They are made with various materials, giving you a wide range of foam densities to pick from. They have various types of coils, so you can choose what's right for you depending on your needs. They provide even weight distribution, adequately balancing your body. They offer pressure point relief, helping to ease tension in your joints, so you will wake up feeling energized and ready to go. Something to consider is that they are more costly than other types of mattresses, so if you're on a budget, this might not be the best choice for you.

Memory Foam Mattresses

If you're thinking about getting a memory foam mattress, this 8-inch California king-size mattress could be a good choice. With pressure-point relief, these mattresses will eliminate any pain in your joints. Designed with various foam types, they offer the perfect amount of support. They boast superior motion isolation, so restless sleepers would highly benefit from these mattresses. A potential downside is that they can smell a bit like chemicals at first, so you'll have to air them out for at least 24 hours before putting sheets on. In addition, they aren't waterproof, so any interaction with moisture can reduce their usable life and cause degeneration.