Top Soft California King-Size Mattresses


Our review process

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

If you're a side-sleeper, a soft California king-size mattress may be a good choice for you. These contouring support mattresses adjust to your body shape for enhanced comfort. Soft mattresses feature an indentation load deflection ranking of 19-21 pounds and are suitable for people who usually sleep on their sides. With additional support, they are great for people who experience back problems or joint pain. However, they can become lumpy or sag over time, so your body won't be adequately aligned when sleeping. Another downside is that they provide less support than other mattresses, so you should search for a firmer mattress if you have back discomfort.

These mattresses are built to be longer, making them great for tall adults. They measure 72" X 84" and are perfect for master bedrooms. They are ideal for couples, offering more than enough space for two people. However, they are large and heavy, making them difficult to transport and flip. Moreover, California king-size mattresses are not suitable for small spaces, taking up a majority of the free space in your room.

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

For a good night's rest and endless comfort, opt for a Comfort Memories Soft Memory Foam California King-Size Mattress. This Comfort Memories mattress has an 8-inch thickness, so the mattress won't dip in the center or collapse on the sides. Available in a California king-size, it provides additional space from top to bottom. With antimicrobial benefits, it manages the growth of mold, bacteria, and dust mites. It has a soft comfort level, which provides a perfect surface for people who sleep on their side as it better cushions the hips and shoulders. It is built to eliminate motion transfer, so any type of movement won't disturb your sleep. With three layers, it delivers extra support on pressure points and greater stability for your back. It features a memory foam construction, holding your body, letting you easily sleep in your natural sleeping position.

    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 Tulo Soft Memory Foam California King-Size 10-Inch Mattress

The Tulo Soft Memory Foam California King-Size Mattress is a great option for anyone who gets overheated at night. This Tulo mattress is available in a California king-size, reducing the width of sleeping space. With a soft comfort level, it is perfect for those who sleep on their back or side and offers a cushioned surface while still relieving specific pressure areas. It has cooling technology, which helps to preserve your optimal resting body temperature. This Tulo mattress is designed with low motion transfer, making it perfect for light sleepers. With a 10-inch thickness, it provides a lot of support and can hold more weight than thinner mattresses. It features three layers and a ventilated design, so it will stay dry in order to prevent mildew and mold from growing. It has a memory foam construction, allowing you to toss and turn and then re-contours to your body after you've settled. This Tulo mattress features a knitted cover, keeping its shape for easy care.

    Pros
    • Soft mattress prevents pressure by balancing your body without having your back or joints sink
    • Cooling technology provides enhanced cooling comfort
    • Reduces motion transfer, making it an ideal choice for restless sleepers
    Cons
    • California king-size reduces the amount of horizontal sleeping space
    • 10-inch thickness provides less support than thicker mattresses
    • Memory foam construction possibly releases a strong odor
For Side Sleepers
An image of Furniture of America Wiltons Soft Memory Foam California King-Size 12-Inch Mattress

For serious comfort and a restful night's sleep, select the Furniture of America Wiltons Soft Memory Foam California King-Size Mattress. With a 12-inch thickness, this Furniture of America mattress can sustain a lot of weight so it won't sink in easily. With a soft comfort level, it is perfect for people who sleep on their side or back and offers a plush-like feeling while still relieving specific pressure points. Available in a California king-size, this Furniture of America mattress provides additional space from top to bottom.

This Furniture of America mattress includes a soft cover, providing an added layer of comfort and protection. It has a memory foam construction, letting you move around in your sleep and then re-contours to your body after you've settled. It has visco-gel foam and viscolatex foam layers. This Furniture of America mattress includes three layers, working together to ensure both comfort and support.

    Pros
    • Soft mattress is suitable for those who sleep on their sides
    • California king-size is the perfect size for big yet narrow rooms
    • Includes a soft cover, providing an added layer of comfort and protection
    Cons
    • California king-size reduces the amount of horizontal sleeping space
    • 12-inch thickness can tend to appear bulky in some bed frames
    • Memory foam construction releases undesirable odors
Additional Picks
An image of Mlily Bliss Soft Memory Foam California King-Size Mattress

For a better night's sleep and ultimate comfort, select a Mlily Bliss Soft Memory Foam California King-Size Mattress. This MLILY mattress features a memory foam construction, which works for every possible sleeping positions. It features pressure point relief technology, providing therapeutic benefits. Available in a California king-size, it will reduce the amount of horizontal sleeping space. It has a silk cover, staying temperature neutral, warm in cold weather and cool in hot weather. With a soft comfort level, it is perfect for back or side sleepers and offers a plush-like feeling while still relieving specific pressure points.

    Pros
    • Soft mattress for excellent support, especially for those who sleep on their side
    • Comes with a silk cover, staying temperature neutral, warm in cold weather and cool in hot weather
    • Provides pressure point relief, minimizing tossing and turning at night
    Cons
    • California king-size reduces the amount of horizontal sleeping space
    • Memory foam construction can be harder to get off of the bed
An image of Natura Eucalyptus Soft Euro Top California King-Size Individually Wrapped Pocket Coils Mattress

If you tend to suffer from allergies, consider the Natura Eucalyptus Soft Euro Top California King-Size Mattress. This fire-resistant Natura mattress is a safe choice for your home. This hypoallergenic mattress is dust mite resistant, so your sleeping area will be allergy and pest-free. With a soft comfort level, it is suitable for side or back sleepers and offers a plush-like feeling while still relieving specific pressure points. It features a hypoallergenic design to decrease the symptoms of allergies. This hypoallergenic mattress is available in a California king-size, reducing the amount of horizontal sleeping space.

Designed with a Euro top construction, this Natura mattress can't move or lose its shape because the pillow layer is sewn under the cover. It features a NaturaWool™ cover, which will manage humidity within the mattress. This Natura mattress features a quilted cover, providing added comfort and cushioning. It is built with individually-wrapped pocket coils to promote airflow for a cooler sleeping surface. It has a design that contours to your body, so you will be fully supported during sleep. Providing a design that reduces tossing and turning, this hypoallergenic mattress will give you the sleeping environment you need for uninterrupted sleep.

    Pros
    • Soft mattress is perfect for those who sleep on their sides
    • Designed with individually-wrapped pocket coils to help in restricting motion transfer between partners
    • Contours to your body for exceptional pressure point relief
    Cons
    • California king-size reduces the width of sleeping space
    • Euro top construction is not the most durable
    • Euro top construction has a tendency to sag
An image of Mlily Serenity Soft Memory Foam California King-Size 13-Inch Mattress

For a good night's rest and endless comfort, select a Mlily Serenity Soft Memory Foam California King-Size Mattress. With a memory foam construction, this thick mattress lets you toss and turn and then re-contours to your body after you've found a comfortable position. It has a supportive design, aligning your spine horizontally when sleeping on your side. It offers pressure point relief, so your spine and joints are well supported to diminish any discomfort. It is available in a California king-size, so it will reduce the width of sleeping space. It features a 13-inch thickness, so it won't sag, sink, or leave body impressions after long periods of time. Featuring a soft comfort level, it is perfect for those who sleep on their side or back and offers a cushioned surface while still relieving specific pressure points.

    Pros
    • Soft mattress is great for those who naturally sleep on their sides
    • Pressure point relief technology ensures that your spine and joints are equally supported in order to diminish any discomfort
    • Supportive design ensures proper spinal support and alignment
    Cons
    • Comes in a California king-size, reducing the width of sleeping space
    • 13-inch thickness can appear bulky in some bed frames
    • Memory foam construction can be hard to get off of the bed
An image of TFS Soft Latex Foam California King-Size 8-Inch Mattress

For both comfort and support, choose the TFS Soft Latex Foam California King-Size Mattress and enjoy a good night's sleep. This TFS mattress is resistant to dust mites, protecting you against the factors that can contribute to allergic reactions. It is mold resistant, making it perfect for humid environments. With an 8-inch thickness, this TFS mattress provides you with a sturdy sleeping surface that won't sink in over time. With a soft comfort level, it is perfect for people who sleep on their side or back and provides a plush-like feeling while still relieving specific pressure points. Available in a California king-size, this organic mattress provides extra space from top to bottom. It has a cotton cover for maximum coziness and comfort.

This organic mattress is designed with a jacquard cover and has a chemical-free cover, making it a safe and non-toxic choice for your sleeping space. It has a quilted cover, providing added comfort and cushioning. It is made with an organic materials, keeping the air free of VOCs. This TFS mattress has a latex foam construction, which resists mold and dust mites naturally. It has a supportive design, which ensures proper spinal support and alignment.

    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 Coaster Home Furnishings Soft Pillow Top California King-Size 390 Bonnel Coil Innerspring Mattress

For a better night's sleep and endless comfort, choose a Coaster Home Furnishings Soft Pillow Top California King-Size Mattress. Available in a California king-size, this Coaster Home Furnishings mattress provides additional room from top to bottom. It is fire resistant, which is a safe choice for your home. It features a soft comfort level, which avoids pressure by balancing your body weight without having your back or joints sink. This Coaster Home Furnishings mattress features a pillow top construction, adding contouring and relieves back pain. It is designed with a chemical-free cover and includes a soft cover, providing an added layer of protection and comfort to your mattress. This Coaster Home Furnishings mattress has a supportive design, which ensures proper spinal support and alignment.

    Pros
    • Soft mattress is perfect for people who enjoy sleeping on their sides
    • Supportive design ensures proper spinal support and alignment
    • California king-size is four inches longer for increased leg room
    Cons
    • Comes in a California king-size, reducing the width of sleeping space
    • Pillow top construction has questionable durability
An image of Mlily Soft Foam California King-Size Bamboo Charcoal-Infused 10-Inch Mattress

For a better night's sleep and ultimate comfort, opt for a Mlily Soft Foam California King-Size Mattress. With a 10-inch thickness, this MLILY mattress can support a lot of weight so it won't lose its shape over time. It has antibacterial materials, which ensure a hygienic sleep space. With a soft comfort level, it provides support for your hips and shoulders, making it suitable for people who sleep on their side. It is made with antimicrobial materials to ensure a clean and healthy sleep area. Available in a California king-size, this organic mattress provides additional space from bottom to top.

This organic mattress reduces the environmental impact because it is built with sustainable materials. Featuring a foam construction, this organic mattress alters to fit your body shape. It features a knitted cover, keeping its shape for easy care. This organic mattress is designed with a soft cover and features a jacquard cover, adding an extra layer of support to the mattress for a more luxurious sleep. It has bamboo charcoal-infused foam.

    Pros
    • Soft mattress is perfect for those who enjoy sleeping on their sides
    • Antimicrobial benefits provide a healthier sleep area
    • Designed with antibacterial materials to decrease the chances of bacteria from growing
    Cons
    • Comes in a California king-size, reducing the amount of horizontal sleeping space
    • 10-inch thickness doesn't provide the most support
    • Foam construction can be hard to get off of the bed
An image of Primo International ORIO-CKYX1502 Soft Pocketed Coil California King-Size 10.5-Inch Mattress

For both comfort and support, choose the Primo International Soft Pocketed Coil California King-Size Mattress and enjoy a good night's sleep. Featuring a 10.5-inch thickness, this Primo International mattress can sustain a lot of weight so it won't sink in easily. It has a polyester cover, which is easy to wash and will dry quickly. Available in a California king-size, this thick mattress provides extra space from top to bottom. With a soft comfort level, it is great for people who sleep on their side because it offers a soft comfort.

This Primo International mattress has a quilted cover, providing added comfort and cushioning. Featuring a pocketed-coil construction, it will provide optimal comfort because it minimizes pressure points. Featuring three layers, this thick mattress provides a secure support system for your entire body. It is designed with innovative pressure point relief technology to enhance comfort and alleviate pain. This Primo International mattress reduces motion transfer, making it an ideal choice for restless sleepers.

    Pros
    • Soft mattress is suitable for those who enjoy sleeping on their sides
    • Comes with a polyester cover, resisting wrinkles and fading over time
    • Provides pressure point relief, reducing pain or stiffness while sleeping
    Cons
    • Comes in a California king-size, reducing the width of sleeping space
    • 10.5-inch thickness may appear disproportional in some bed frames
    • Pocketed-coil construction can accumulate dust more easily
Soft California King-Size Mattresses: Here's Some More Information To Think About:
All You Need to Know About Mattress Thickness
6-8 Inch Mattresses

There are only two soft California king-size mattresses with a thickness of 6-8 inches. These 6-8 inch mattresses are suitable to use with standard-size sheets, so it will be easy to find linens that fit. Ideal for trundle beds due to their slim nature, they are convenient for slumber parties. They are easy to carry thanks to their compact construction. However, they might get indentations if there's too much weight put on them, so if you're looking for a mattress for two, they're not a great choice for you. Another drawback is that these mattresses wear out quickly, so you will have to replace them more often. If you think a 6-8 inch mattress is a good choice, check out this one.

8-10 Inch Mattresses

Looking for a soft California king-size mattress that's not too thick or thin? There are eight for you to check out. These mattresses have a standard thickness, so you can rest assured knowing that they'll be able to fit in almost any bed frame. Less likely to cave in, they will provide proper support, even after long-term use. They are suitable to use with standard-size sheets, so it will be easy to find linens that fit. A potential downside is that they can get indentations if there's too much weight put on them, so if you share your bed, you might want to look for a thicker mattress. Moreover, these mattresses wear out quickly, so they will need to be replaced more frequently. If you think an 8-10 inch mattress is a good choice, check out this one.

10-12 Inch Mattresses

There are only two soft California king-size mattresses with a thickness of 10-12 inches. These mattresses have a standard thickness, so you can rest assured knowing that they'll be able to fit in almost any bed frame. They are less likely to cave in, so the surface will remain level to ensure proper support over time. They are suitable to use with standard-size sheets, so it will be easy to find linens that fit. They have a sturdy build, so they can sustain more weight than other kinds of mattresses. Something to keep in mind is that they are higher off the ground, so getting into and out of bed is harder than it would be with a thinner mattress. If you think a 10-12 inch mattress is a good choice, here's one to take a look at.

Choose the Right Soft California King-Size Mattress for You
Hybrid Mattresses

If you're thinking about getting a hybrid mattress, this soft California king-size mattress could be a good choice for you. With even weight distribution, these mattresses will offer proper spinal alignment without sinking or tipping. Designed to keep you cool all night long and improve your sleep quality, they are designed to dissipate heat instead of absorb it, so you can stay cool when you sleep. These hybrid mattresses provide pressure-point relief by supporting the most sensitive areas of the body. Designed with various foam types, they provide the perfect amount of comfort. Something to consider is that hybrid mattresses are expensive, so if you're searching for a cheaper mattress, you should consider something else.

Memory Foam Mattresses

If you want a memory foam mattress, this soft California king-size mattress could be a good choice for you. These mattresses provide pressure-point relief by supporting the most sensitive areas of the body. They are available in a number of different types of materials, giving you a range of foam densities to pick from. They have superior motion isolation, so your partner's movements won't disturb you while sleeping. However, these mattresses can smell a bit like chemicals initially, 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 decrease their usable life and cause degeneration.

Innerspring Mattresses

If you're thinking about getting an innerspring mattress, this soft California king-size mattress might be a good choice. Designed with firm edges, these mattresses provide stable support and decrease roll-off. Designed to keep you comfortable all night long and improve your sleep quality, they are designed to dissipate heat instead of absorb it, so you can stay cool during a night's sleep. They feature a breathable design, which extends the lifespan of the mattress by enabling air to circulate freely. They are made from various materials, giving you a wide range of foam densities to pick from. Something to keep in mind is that they are likely to experience premature sagging, so you'll have to buy a new one much sooner than other types of mattresses. In addition, they have poor motion isolation, so they aren't ideal for light sleepers.