Unmatched grandeur and grace with California King size beds and mattresses
Casper Cal King Mattresses
Financing Options
Convenient Mattress Financing
Get Special Financing on purchases with approved credit with a Mancini's Sleepworld credit card. View plans and apply for financing.
*The Mancini's Sleepworld credit card is issued with approved credit by Wells Fargo Bank, N.A.
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Medium Firm
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On Sale
- SleepMatch: blue
- Delivery by May 17
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Firm
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On Sale
- SleepMatch: red
- Delivery by May 17
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Firm
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On Sale
- SleepMatch: blue
- Delivery by May 28
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Medium Firm
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On Sale
- SleepMatch: green
- Delivery by May 17
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Cushion Firm
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On Sale
- SleepMatch: green
- Delivery by May 17
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Medium Firm
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On Sale
- SleepMatch: blue
- Delivery by May 22
Casper Cal King Mattresses
At Mancini's Sleepworld, we understand that choosing a California King mattress is about more than size. It's about creating a sleep space that matches your lifestyle. Casper's Cal King mattresses bring the brand's signature cooling and ergonomic engineering to the longest standard mattress size available.
Casper Cal King mattresses feature the same performance-driven technologies as every model in the lineup. AirScape™ foam promotes continuous airflow, ZonedSupport™ delivers targeted alignment, and hybrid models incorporate individually pocketed Flex Coils for responsive, motion-isolating support. The California King's extra length (84 inches) makes it a natural choice for taller sleepers or anyone who values stretch-out room.
Whether you are furnishing a spacious primary bedroom or upgrading to a size that suits your frame, a Casper Cal King is designed to deliver cool, supportive comfort. Explore our selection at Mancini's Sleepworld, where our mattress matchmakers are ready to help you find the right Casper model. You can also take the SleepMatch quiz online for personalized mattress recommendations.
Frequently Asked Questions
"What makes Casper mattresses worth it?" you ask? Casper mattresses are engineered for cooling, comfort, and ergonomic support, and the Cal King size brings those benefits to one of the most spacious mattress formats available. The extra 4 inches of length compared to a standard King makes the Cal King ideal for taller individuals who need room to fully stretch out.
Every Casper mattress features AirScape™ breathability and ZonedSupport™ for ergonomic alignment. Hybrid models add individually pocketed Flex Coils for responsive support and excellent motion isolation, which is especially valuable for couples sharing a larger bed.
For customers in the San Francisco Bay and Sacramento area who want a performance mattress in a size built for tall or active sleepers, a Cal King Casper is an excellent choice.
Every Casper mattress features AirScape™ breathability and ZonedSupport™ for ergonomic alignment. Hybrid models add individually pocketed Flex Coils for responsive support and excellent motion isolation, which is especially valuable for couples sharing a larger bed.
For customers in the San Francisco Bay and Sacramento area who want a performance mattress in a size built for tall or active sleepers, a Cal King Casper is an excellent choice.
Choosing the best Cal King Casper mattress is easier with SleepMatch, Mancini's Sleepworld's diagnostic system designed to remove the guesswork from mattress shopping.
Our advanced diagnostic system analyzes your body type and pressure points to recommend mattresses that will provide the right level of support for you. This is especially relevant for Cal King shoppers, who are often taller individuals, couples seeking extra length, or sleepers who share the bed with children or pets.
You can complete SleepMatch in-store or take the SleepMatch quiz online.
Our advanced diagnostic system analyzes your body type and pressure points to recommend mattresses that will provide the right level of support for you. This is especially relevant for Cal King shoppers, who are often taller individuals, couples seeking extra length, or sleepers who share the bed with children or pets.
You can complete SleepMatch in-store or take the SleepMatch quiz online.
A Cal King Casper mattress typically lasts between 7 and 10 years, depending on the model and care.
Cal King mattresses are frequently the primary mattress in a household and tend to see nightly use, often by two sleepers. Casper's CertiPUR-US® certified foams and, in hybrid models, tempered steel Flex Coils are designed to resist sagging and maintain structural integrity over time. Sleep health experts generally recommend evaluating your mattress every 7 to 10 years.
For customers across the San Francisco Bay and Sacramento area who want long-term performance in a larger size, a Cal King Casper is built to deliver.
Cal King mattresses are frequently the primary mattress in a household and tend to see nightly use, often by two sleepers. Casper's CertiPUR-US® certified foams and, in hybrid models, tempered steel Flex Coils are designed to resist sagging and maintain structural integrity over time. Sleep health experts generally recommend evaluating your mattress every 7 to 10 years.
For customers across the San Francisco Bay and Sacramento area who want long-term performance in a larger size, a Cal King Casper is built to deliver.
Casper offers several distinct mattress models, each designed with a focus on cooling and ergonomic performance.
The Casper Slate is a firm all-foam option with breathable support at an accessible price point. The Casper One is the signature all-foam mattress with Breathe Flex Foam and Align Memory Foam. The Casper Dream is a hybrid featuring Flex Coils, ZonedSupport™, and a Breathe+ comfort layer for enhanced airflow. The Casper Snow targets hot sleepers with Snow Technology™ and Phase Change Material for sustained cooling. The Casper Dream Max is the premium hybrid with Zoned Support Max, precision-cut foam channels, and Align+ Flex Foam for deep pressure relief.
Customers in the San Francisco Bay and Sacramento area can shop Casper Cal King mattresses online or visit a Mancini's Sleepworld showroom to compare models in person.
The Casper Slate is a firm all-foam option with breathable support at an accessible price point. The Casper One is the signature all-foam mattress with Breathe Flex Foam and Align Memory Foam. The Casper Dream is a hybrid featuring Flex Coils, ZonedSupport™, and a Breathe+ comfort layer for enhanced airflow. The Casper Snow targets hot sleepers with Snow Technology™ and Phase Change Material for sustained cooling. The Casper Dream Max is the premium hybrid with Zoned Support Max, precision-cut foam channels, and Align+ Flex Foam for deep pressure relief.
Customers in the San Francisco Bay and Sacramento area can shop Casper Cal King mattresses online or visit a Mancini's Sleepworld showroom to compare models in person.
Casper mattresses are backed by a 10-year limited manufacturer's warranty, covering defects in materials and workmanship.
When you purchase your Casper mattress from Mancini's Sleepworld, your purchase is also protected by the Rest Easy Promise, which includes:
When you purchase your Casper mattress from Mancini's Sleepworld, your purchase is also protected by the Rest Easy Promise, which includes:
- Best Price Guarantee (we guarantee the lowest prices)
- 365 Night Comfort Guarantee when you purchase a premium mattress protector (your standard 120-night guarantee is upgraded)
- Double Your Warranty on select mattresses with use of a premium mattress protector (Mancini's Sleepworld will double the manufacturer's warranty up to 20 years)
- Free Next-Day Delivery (includes old mattress removal and professional setup)
You can purchase a Cal King Casper mattress near you in the San Francisco Bay and Sacramento area at Mancini's Sleepworld, with over 50+ locations.
Whether you prefer to shop online or visit a showroom to test firmness options in person, Mancini's Sleepworld offers expert guidance and fast local delivery to help you get the mattress you want with minimal hassle.
To find a showroom, find a Mancini's Sleepworld near you in the San Francisco Bay and Sacramento area.
Whether you prefer to shop online or visit a showroom to test firmness options in person, Mancini's Sleepworld offers expert guidance and fast local delivery to help you get the mattress you want with minimal hassle.
To find a showroom, find a Mancini's Sleepworld near you in the San Francisco Bay and Sacramento area.
Absolutely. A Mancini's Sleepworld showroom is the best place to experience Casper's cooling comfort, responsive foam layers, and ergonomic support before you commit.
Testing different Casper models and firmness levels in person can help you confidently select the right Cal King mattress for your sleep style and comfort preferences.
Ready to try before you buy? find a Mancini's Sleepworld near you in the San Francisco Bay and Sacramento area.
Testing different Casper models and firmness levels in person can help you confidently select the right Cal King mattress for your sleep style and comfort preferences.
Ready to try before you buy? find a Mancini's Sleepworld near you in the San Francisco Bay and Sacramento area.
Mancini's Sleepworld has been helping people sleep better since 1969\. Our mattress matchmakers combine product knowledge with personalized service to help you find the right fit.
When you shop Casper at Mancini's Sleepworld, you benefit from the Rest Easy Promise, including price protection, extended comfort guarantees, warranty enhancements, Free Next-Day Delivery, and complimentary old mattress removal.
For customers in the Bay Area, Sacramento area, and surrounding communities, Mancini's Sleepworld offers a trusted local experience built on over 50 years of sleep expertise.
When you shop Casper at Mancini's Sleepworld, you benefit from the Rest Easy Promise, including price protection, extended comfort guarantees, warranty enhancements, Free Next-Day Delivery, and complimentary old mattress removal.
For customers in the Bay Area, Sacramento area, and surrounding communities, Mancini's Sleepworld offers a trusted local experience built on over 50 years of sleep expertise.