Best california king mattress toppers

By Katie Dyal

Is your mattress in need of a facelift? Are you experiencing restless sleep because you can’t get comfortable? Here at Mattress Advisor, we have the perfect solution for you and it doesn’t include buying a completely new mattress.

Adding a mattress topper to your bed is the perfect way to gain extra support, regulate your body temperature, and add additional comfort to your mattress. We have chosen six of the best mattress toppers for your California king-size bed, as well as what to look for when selecting the perfect mattress topper.

The best california king mattress toppers

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SLEEP ZONE Premium Mattress Pad Cover Cooling Overfilled Fluffy Soft Topper

Best overall

Cooling with extra plushness

The Sleep Zone is the best for a reason.

Featuring Nanotex cooling technology, this luxurious mattress topper cools and dries any moisture that gets in between you and a restful night’s sleep – resistant to both dust and bacteria all at once. Made with 120gsm microfiber, its textured design is stylish and breathable. The inside filling is made with squishy silicone fiber. You’re sure to sleep cozy and fresh on this mattress topper.

Why we love it:

  •     Feels like it’s filled with down feathers
  •     Stays firm and doesn’t sink in the middle
  •     Quilted stretch design for easy mattress fittings
  •     Machine washable
  •     For use on most mattresses, even California king beds
KARRISM Extra Thick Mattress Topper, Cooling Mattress Pad Cover Topper

Best cooling mattress topper

Extra thick and luxurious 

This mattress is extra plush, yet supportive to the back and shoulders, and even pleasant for those who prefer a more firm mattress.

The Karrism mattress topper is the perfect solution for those looking to restore their older mattress to a cushier and hotel-grade feel. Pure cotton material makes this topper breathable and helps circulate airflow, even for those who tend to sleep hot. There is no memory foam involved – snow down alternative filling makes up its luxurious plushness.

Why we love it:

  •     400 thread count cotton material
  •     Feels like goose down stuffing
  •     Constantly cooling material
  •     Deep elastic pockets for a snug fit for California king beds
  •     Machine washable and dryer compatible
ViscoSoft 4 Inch Pillow Top Gel Memory Foam Mattress Topper

Best pain relieving mattress topper

Body-hugging and comforting

Temperature controlled gel memory foam and pearl fiber down alternative makes this ViscoSoft mattress topper the most therapeutic mattress topper yet.

This mattress topper is the best choice for those who tend to wake up stiff and sore most mornings. A combination of softness and support will cradle your body’s most delicate pressure points – continually providing lumbar, neck, and hip support throughout the night.

Why we love it:

  •     No unpleasant smell
  •     Pure, three hundred thread count cotton material
  •     Extra supportive
  •     Machine washable, dryable, and resistant to shrinkage
  •     Cooling gel memory foam
  •     Secure fit bands for a snug fit
LUCID 4 Inch Gel Memory Foam Mattress Topper

Best temperature-controlled mattress topper

Breathable and ultra cushy

If you prefer your bed to cradle you while you sleep, the Lucid four-inch mattress topper is the design for you.

Turn your old mattress into a hotel-grade mattress again. Feel the difference between other memory foam mattress toppers as this topper allows you to stay cool throughout the night with heat absorbing technology that fights against the night sweats and provides perpetual ventilation. You will wake up feeling rejuvenated, since the foam contours to your body and relieves your most sensitive pressure points.

Why we love it:

  •     Fits California king beds
  •     Ventilation holes distributed throughout the topper for a refreshing night’s sleep
  •     Four inches of plush, gel-infused memory foam
  •     Contours to the body
  •     Therapeutic
  •     Easy box-to-bed set up
LUCID 2-Inch Ventilated Gel Infused Memory Foam Mattress Topper

Best responsive mattress topper

Soothing and pressure point relieving

Save yourself the hassle of looking for a completely new mattress with this practical mattress topper.

Another Lucid brand choice, it features three inches of gel-infused memory foam. This thickness is perfect for those who prefer a less-contoured cradle as they sleep but still want the support and softness of the four-inch option that Lucid offers. The gel-infused memory foam has a built-in cooling technology, keeping you cool and warding off dust, mites, and bacteria constantly. The best part? When you toss and turn, you won’t sink in a hole and this mattress is extra responsive to different sleeping positions.

Why we love it:

  •     No-slip design: Stays puts on top of your mattress
  •     Relieves pressure
  •     Hypoallergenic
  •     Masks the feeling of springs in old mattresses
  •     Great to spinal alignment
LINENSPA 2 Inch Gel Infused Memory Foam Mattress Topper

Best memory foam mattress topper

Inviting and rejuvenating

The Linespa two-inch California king-sized mattress topper is another smart choice for people who prefer not to have their mattress engulf them in their sleep.

Instead, enhance your sleeping routine with this extra firm and responsive gel-infused memory foam mattress topper that is practical for your wallet, yet comfortable.

Why we love it:

  •     Pure and plush polyurethane foam
  •     Gel-infused memory foam
  •     Cooling technology that won’t retain body heat
  •     Supports pressure points
  •     Made ecofriendly: CertiPUR-US certified

How to find the best california king mattress topper

Now that you know our top choices for mattress toppers, it’s time for you to weigh your options. When deciding on the topper for you, consider three factors:

Thickness: The thickness you choose for your mattress topper should depend on your comfort preferences. Do you prefer that a mattress contours your body? Then consider sticking with a thickness between three to five inches. If you prefer a more firm feel without a lot of body contouring, stick with a thickness of one to three inches.

Cooling Technology: If you tend to sleep hot or are prone to the night sweats, consider choosing a mattress topper that features cooling technology. While regular mattress toppers may trap heat in, cooling or gel-infused mattress toppers will evenly absorb and disperse the heat throughout the entire mattress.

Material: Mattress toppers are made from various materials, but the smart choices are to stick with pure cotton or polyurethane materials. Veer away from latex material, as this is known to cause allergic reactions among users.


Mattress toppers are a smart choice for those looking to add extra comfort to their old or less comfy mattress. Choose a topper that meets your firmness, temperature, and material criteria and wake up feeling refreshed.

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