Top 74+ Impressive Extra Firm California King Mattress Most Outstanding In 2023

The Sealy Posturepedic Response Premium West Salem Cushion Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with high-quality materials and advanced features to provide exceptional support and comfort for a restful night's sleep.

The West Salem Cushion Firm California King Mattress features Sealy's exclusive Response Pro Encased Coil System, which provides targeted support to the areas of your body that need it most. This system also helps reduce motion transfer, so you won't be disturbed by your partner's movements throughout the night.

With its cushion firm feel, this mattress is perfect for those who prefer a slightly softer surface without sacrificing support. It also features Sealy's Posturepedic Technology, which targets the heaviest part of your body to provide reinforced support where you need it most.

For added comfort, the West Salem Cushion Firm California King Mattress has a layer of SealyCushion Extra Soft Foam, which is designed to conform to your body for a plush, yet supportive feel. This mattress also has a moisture-wicking cover to keep you cool and comfortable throughout the night.

Overall, the Sealy Posturepedic Response Premium West Salem Cushion Firm California King Mattress is a fantastic choice for those looking for an extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a restful and supportive night's sleep.

The Beautyrest Black Calista Extra Firm California King Mattress is a luxury mattress designed for those who prefer a firm sleeping surface. This mattress is part of the Beautyrest Black Collection, which is known for its high-quality materials and advanced features.

The Calista Extra Firm California King Mattress features Beautyrest's innovative T3 Pocketed Coil Technology, which provides superior support and helps reduce motion transfer. This technology is designed with three steel strands for durability and targeted support to the areas of your body that need it most.

In addition to its advanced coil system, this mattress also features Beautyrest's BlackICE 4.0 Technology, which uses a cool-to-the-touch cover and a layer of High Airflow SilkAir Fiber to help regulate your body temperature and keep you cool throughout the night.

The Calista Extra Firm California King Mattress also has a layer of Beautyrest Gel Memory Foam, which conforms to your body for pressure relief and additional support. This mattress is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

Overall, the Beautyrest Black Calista Extra Firm California King Mattress is a top choice for those looking for a luxury, extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a restful and comfortable night's sleep.

The Serta Perfect Sleeper Elite Trelleburg II Extra Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with Serta's exclusive Perfect Sleeper technology, which is clinically proven to provide a better night's sleep.

The Trelleburg II Extra Firm California King Mattress features Serta's 1000 Edition Custom Support Coil System, which provides targeted support to the areas of your body that need it most. This system also helps reduce motion transfer, so you won't be disturbed by your partner's movements throughout the night.

For added comfort, this mattress has a layer of Cool Twist Gel Memory Foam, which helps regulate your body temperature and conforms to your body for pressure relief. It also has a layer of Serta Balanced Support Foam, which provides additional support and helps reduce tossing and turning.

The Trelleburg II Extra Firm California King Mattress also features a moisture-wicking cover, keeping you cool and comfortable throughout the night. It is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

In summary, the Serta Perfect Sleeper Elite Trelleburg II Extra Firm California King Mattress is a fantastic choice for those looking for an extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a comfortable and supportive night's sleep.

The Stearns & Foster Estate Rockwell Luxury Firm California King Mattress is a top-of-the-line choice for those seeking an extra firm sleeping surface. This mattress is handcrafted with high-quality materials and features advanced technology to provide exceptional support and comfort.

The Rockwell Luxury Firm California King Mattress features Stearns & Foster's IntelliCoil Advanced Coil System, which is designed to provide individualized support to your body's unique shape and size. This system also helps reduce motion transfer, so you won't be disturbed by your partner's movements throughout the night.

In addition to its advanced coil system, this mattress has a layer of PrimaCool Performance Fabric, which is a moisture-wicking, breathable material that helps regulate your body temperature for a cool and comfortable night's sleep. It also has a layer of PrimaSense Gel Foam, which conforms to your body for pressure relief and additional support.

The Rockwell Luxury Firm California King Mattress also features a layer of PrimaCool Elite Gel Memory Foam, which provides additional pressure relief and helps promote airflow for a cooler sleeping experience. It is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

Overall, the Stearns & Foster Estate Rockwell Luxury Firm California King Mattress is a top choice for those looking for a handcrafted, extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a restful and comfortable night's sleep.

The Tempur-Pedic ProAdapt Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with Tempur-Pedic's exclusive TEMPUR-APR material, which provides superior pressure relief and conforming support.

The ProAdapt Firm California King Mattress features Tempur-Pedic's original TEMPUR support layer, which adapts to your body's unique shape, weight, and temperature for personalized support and comfort. It also has a layer of TEMPUR-ES Comfort Layer for additional pressure relief and a cool-to-the-touch cover for a comfortable sleeping experience.

In addition to its advanced materials, this mattress also features Tempur-Pedic's SmartClimate Dual Cover System, which is designed to be cool to the touch and helps regulate your body temperature for a comfortable night's sleep. It also has a high-stretch performance panel to allow for maximum pressure relief.

The ProAdapt Firm California King Mattress is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials. Overall, this mattress is a fantastic choice for those seeking an extra firm sleeping surface with advanced features and high-quality materials.

The Simmons Beautyrest Silver Level 1 Extra Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with high-quality materials and advanced features to provide exceptional support and comfort.

The Silver Level 1 Extra Firm California King Mattress features Beautyrest's exclusive Pocketed Coil Technology, which provides targeted support to the areas of your body that need it most. This system also helps reduce motion transfer, so you won't be disturbed by your partner's movements throughout the night.

For added comfort, this mattress has a layer of AirCool Foam, which provides a cool, comfortable sleeping surface. It also has a layer of GelTouch Foam, which conforms to your body for pressure relief and additional support. The Silver Level 1 Extra Firm California King Mattress also has a moisture-wicking cover to keep you cool and comfortable throughout the night.

In summary, the Simmons Beautyrest Silver Level 1 Extra Firm California King Mattress is a top choice for those looking for an extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a comfortable and supportive night's sleep.

The Sleep Number i8 Smart Bed Extra Firm California King Mattress is a technologically advanced choice for those seeking an extra firm sleeping surface. This mattress is designed with Sleep Number's exclusive DualAir technology, which allows you to adjust the firmness level on each side of the bed to your desired comfort level.

The i8 Smart Bed Extra Firm California King Mattress also features Sleep Number's Responsive Air technology, which allows the mattress to adjust to your body's movements, providing individualized support and pressure relief. It also has a layer of PlushFit Foam for additional cushioning and comfort.

In addition to its advanced features, this mattress also has a temperature balancing sleep surface to help regulate your body temperature and keep you cool throughout the night. It is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

Overall, the Sleep Number i8 Smart Bed Extra Firm California King Mattress is a top choice for those looking for a customizable, extra firm sleeping surface with advanced technology and high-quality materials.

The Purple Hybrid Premier Extra Firm California King Mattress is a unique and innovative choice for those seeking an extra firm sleeping surface. This mattress is designed with Purple's patented Hyper-Elastic Polymer material, which provides superior pressure relief and support.

The Hybrid Premier Extra Firm California King Mattress features a layer of Purple's Smart Comfort Grid, which is designed to adapt to your body's unique shape and relieve pressure points. It also has a layer of Responsive Support Coils for additional support and motion isolation.

In addition to its advanced materials, this mattress also features Purple's cooling technology to help regulate your body temperature and keep you cool throughout the night. It is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

In summary, the Purple Hybrid Premier Extra Firm California King Mattress is a top choice for those looking for a unique and supportive extra firm sleeping surface. Its advanced features and high-quality materials make it a top pick for a comfortable and restful night's sleep.

The Casper Wave Hybrid Extra Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with Casper's exclusive Zoned Support system, which provides targeted support to the areas of your body that need it most.

The Wave Hybrid Extra Firm California King Mattress also features Casper's advanced AirScape 3 foam, which is designed to be breathable and provide pressure relief. It also has a layer of latex foam for added support and comfort.

In addition to its advanced materials, this mattress also has a cooling cover to help regulate your body temperature and keep you cool throughout the night. It is also CertiPUR-US certified, meaning it is made without harmful chemicals and materials.

Overall, the Casper Wave Hybrid Extra Firm California King Mattress is a top choice for those looking for an extra firm sleeping surface with advanced features and high-quality materials.

The Saatva Classic Firm California King Mattress is a top-rated choice for those seeking an extra firm sleeping surface. This mattress is designed with high-quality materials and features a unique dual coil system for exceptional support and comfort.

The Classic Firm California King Mattress features a layer of individually wrapped coils for targeted support and motion isolation. It also has a layer of memory foam for pressure relief and a layer of lumbar support for added comfort.

In addition to its advanced coil system, this mattress also has a Euro pillow top for added cushioning and comfort. It also has a breathable organic cotton cover to keep you cool and comfortable throughout the night.

In summary, the Saatva Classic Firm California King Mattress is a top choice for those looking for an extra firm sleeping surface with high-quality materials and advanced features. Its unique dual coil system and added comfort layers make it a top pick for a restful and supportive night's sleep.