Very firm but comfortably supports my spine after two surgeries. I go right to sleep without tossing and turning like I did with my previous mattress.

[This review was collected as part of a promotion.] This hybrid mattress is perfect for our guest room. It is comfortable, durable, and breathable. It is a firm mattress, but it doesn't feel too hard, and the support it provides is great.

[This review was collected as part of a promotion.] This Matress has been really good with my back. It's comfortable and you get good sleep at night. The hybrid technology keeps my body cool and it's nice to feel firmness along with comfort.

Having slept on our new Serta Perfect Sleeper X Hybrid Knox Plush Cal King for two nights has been wonderful. Supportive and comfortable for much needed good night sleep.

So firm! I love it!

Great night's sleep!

Firm and supportive!!

So star, so good!

good Support for my back

Comfy and nice matters