The Best California King Mattresses on Amazon

Best Odor Control

Zinus Memory Foam 12 Inch Green Tea Mattress, California King

The Zinus Memory Foam 12-Inch Green Tea mattress would be an excellent California King size mattress for any room. The Zinus mattress features one of the latest upgrades in the world of memory foam which involves the replacement of some of the conventional petroleum with natural plant oils like green tea.

The infusion of the green tea oil and extracts help to keep the mattress smelling fresh even after long-term use. The use of natural green tea is far more preferable to the noxious chemicals that some other mattresses use for odor control. The green tea infused, memory foam mattress offers sleepers the typical medium feel of a memory foam mattress, with the firmness level rating of a 6 out of 10.

It is made with four layers of foam: a 3.5” layer of high-density base support foam, a 3.5” layer of high-density foam, a 2” layer of comfort foam, and a 3” layer of memory foam. The layers of high-density foam work together to form a supportive base to this mattress, while the comfort foam and memory foam layers work to provide exceptional pressure relief. 

Best for Plus Sized Sleepers

Classic Brands Cool Gel 1.0 Ultimate Gel Memory Foam 14-Inch Mattress with BONUS 2 Pillows, California King

Not only does the Classic Brands Cool Gel mattress look great, it feels even better. The gel-infused mattress utilizes a fully foam design, combining layers of poly foam and memory foam atop a HD base foam for a total height of 14-inches.

The bottom layer of this mattress is a thick layer of high density foam, which works as a sturdy supportive layer for the base of the bed. The middle layer is Classic Brand’s Cool Gel Poly Foam, which continues to provide support while adding a layer of plush comfort. Finally, the top layer is the Cool Gel Memory Foam, which provides sleepers with a pressure-relieving and cooling sleep surface. These three layers of foam are wrapped within a beautifully tailored stretch knit fabric cover with waterfall edges and matching knit side panels.

Aside from the cooling technology and high breathability of this mattress, it is also hypoallergenic. It is compatible with adjustable bases as well as foundation bases, slatted platforms, flat platforms, and box springs. The foam mattress has a medium-plush feel but still offers sleepers a firm support level. Overall, this supportive mattress conforms to your body while the cool gel helps to regulate temperature and help you get your best night’s sleep.

Best for Hot Sleepers

Olee Sleep 10 Inch Gel Infused Layer Top Memory Foam Mattress Blue, Cal King

The Olee Sleep 10-inch Gel Mattress is the perfect choice for anyone who sleeps hot. The gel-infused memory foam that is utilized in this mattress has an ideal cooling effect on sleepers, and it offers the perfect level of pressure relief.

Unlike many other mattresses, Olee’s 10-inch mattress uses a bio-green foam, meaning that some of the traditional petroleum in the memory foam mattress is replaced with natural palm oil. In addition, the mattress makeup includes activated bamboo charcoal, a natural way to control bacteria, odor, and absorb moisture – a plus compared to mattresses that use harmful chemicals to achieve the same effects. The mattress offers a medium-firm mattress consistent with memory foam mattresses of the same thickness and ideal for all sleeping positions.

Best for the Guest Room

Linenspa 8 Inch Memory Foam and Innerspring Hybrid Mattress – Medium-Firm Feel – Cal King

Linenspa has become a well-known bed-in-a-box manufacturer – and for good reason. The company builds great quality mattress in all sizes and thicknesses, and sells them for unbeatable prices; and, their 8-inch Hybrid Mattress is no different.

The 8-inch profile offers a medium-firm feel that is perfect for your child’s room, a college dorm, or a guest room. The hybrid design combines the reliable support of a traditional spring mattress with the pressure point relief of memory foam to achieve the best of both worlds.  The tempered steel coils provide sleepers with a highly supportive base layer that ensures maximum spinal support. Layered on top of the innerspring coils is a thick layer of comfort foam to create a cushioned surface.

The top layer of the mattress is a quilted memory foam, which adds a plush layer of foam to conform to your body and relieve pressure. Plus, even though it has the innerspring coils, Linenspa has still figured out a way to compress it down for shipping so there is no need for difficult installation in your bedroom.