These are the best California king mattresses you can buy, according to our experts. Our expert, award-winning staff selects the products we cover and rigorously researches and tests our top picks.

Aly Lopez is a writer on the sleep team at CNET. She tests, researches and reviews everything sleep-related, from mattresses and bedding to sleep trends and hacks to sleep technology and supplements.

204 PREMIUM COILS -- High coil count orthopedic crib mattress with 204 durability-tested coils for premium firmness. AIRY 2-STAGE DESIGN -- 2-sided dual firmness mattress offers a firmer infant ...

Available in sizes twin to California king and starting at just $599, the Boring Hybrid Mattress is a 10-inch mattress, made with responsive, pressure-relieving foams and motion-reducing springs.

We also considered each bed’s cooling properties, looking for features like gel-infused foams, phase change materials, coils ... queen-size mattress. For couples looking for a king-size mattress ...

You might think there are only three adult mattress sizes – single, double and king – but adult mattresses actually come in 10 different sizes. Find out what they are and discover the most popular ...

This is likely due to the comfort layers up top, which are made with high-density memory foam that cushions your frame as you sink into the mattress. Thick steel coils lie below, ensuring you don ...

The DreamCloud Premier now costs from $749 with a discount (was $1,116) and rises up to $1,249 for a Cal king size in the ... of individually wrapped coils. A hybrid mattress like this is perfect ...

This medium-firm mattress is wrapped in a breathable cashmere top, giving it that extra touch of luxury. Plus, the memory foam and innerspring coil mix keeps motion transfer to a minimum ...

Graphite-infused AirFoamIce and a cool-touch cover handle the cooling, while pressure relief comes courtesy of foam and an 8-inch coil system. In our Nolah Evolution 15 mattress review ...

The Serta perfect sleeper is an ultra-supportive mattress, thanks to its 825-coil system. Paired with a cooling gel memory foam and cooling fabric, you can more easily regulate your temperature ...

There are four main mattress construction types: pocket sprung, memory foam/foam, coil spring and latex. You'll also find hybrid mattresses, which are made from a combination of foam and springs – we ...