Serta Perfect Sleeper Cobalt Calm Extra Firm
GoodBed Expert Review
Our Take on Serta Perfect Sleeper Cobalt Calm Extra Firm
Founder of GoodBed, Leading Mattress Expert
BEST if you
- Want an ultra firm mattress
- Are mainly a stomach sleeper (though this mattress can also be very good for back sleepers)
- Have a strong preference for sleeping 'on' your mattress rather than 'in' it
- Regularly sit or sleep along the edge of your bed (edge support is excellent)
- Want a mattress that helps you stay cool while you sleep
- Prefer a below average amount of 'memory feel'
NOT IDEAL if you
- Are a side sleeper, especially if you weigh less than 150 lb
- Don't like a lot of bounce in your mattress
- Can be easily disturbed by other movements in the bed (though motion isolation is still OK)
- May use this mattress on an adjustable base (adjustable base compatibility isn't the best, but is still pretty good)
- Prefer some softness in your mattress
Serta Perfect Sleeper Collection Overview
GoodBed Editorial
GoodBed's in-depth discussion of the features and construction of Serta's Perfect Sleeper mattresses, sold as Dazzling Night, Adoring Nights, Cobalt Calm and other names.
See our full reviewYour Personal Match Score
Is this the Right Product for You?
for Serta Perfect Sleeper Cobalt Calm Extra Firm
Materials & Construction
| Cover | 1″ quilted cover (w/ "CoolFeel Fabric") |
|---|---|
| Comfort Layers | 1″ memory foam ("Cool Twist Gel Memory Foam") |
| Transition Layers | 1″ poly foam ("Serta Support Foam") |
| Support Layers |
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| Total Thickness | 12'' |
Compare These Products
Serta Perfect Sleeper Cobalt Calm Extra Firm vs. Other Beds
Compare the Serta Perfect Sleeper Cobalt Calm Extra Firm mattress side by side with other Serta models, or with mattresses from other brands.
Where to Buy
Serta Perfect Sleeper Cobalt Calm Extra Firm
Serta Online Seller
- Free delivery
- Return policy
- Financing available
- Free delivery ($999+)
- 120-day return policy
- Lowest price guarantee
- Financing available
Related Video Reviews
Frequently Asked Questions
Serta Perfect Sleeper Cobalt Calm Extra Firm
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In our evaluation of the Serta Perfect Sleeper Cobalt Calm Extra Firm mattress, we found it to be a Ultra Firm (1) on the GoodBed rating scale (1= firmest, 9 = softest).
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Mattress matching is highly personal. This is why GoodBed refuses to publish bogus "best mattress" lists and instead created an advanced mattress matching tool called the GoodBed Quiz. This quiz can assess your requirements in just a few minutes, and then calculate your personal Match Score for the Serta Perfect Sleeper Cobalt Calm Extra Firm mattress, along with any of the other 800+ mattresses that we've evaluated.
To see your Match Score for the Serta Perfect Sleeper Cobalt Calm Extra Firm, simply use this link to take the GoodBed Quiz. Your Match Score for this mattress will be shown at the top of your quiz results, and will include a detailed explanation of how it matches up with your personal mattress requirements. Each Match Score is based on over 50 different Mattress DNA™ attributes that we measure through our proprietary mattress testing framework.
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Yes, the Serta Perfect Sleeper Cobalt Calm Extra Firm mattress is adjustable base compatible. This means it is designed to be used on an adjustable base without incurring damage or voiding the warranty. In our review of this mattress, we tested it on an adjustable base to look for any adverse effects as the head and foot are elevated, and to see how well it conforms to the contours of the base both with and without the weight of a sleeper. Overall, we found the Cobalt Calm Extra Firm to have pretty good adjustable base compatibility.
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Here are the in-home trial details for mattresses purchased from the Serta website:
- Policy: Comfort Guarantee -- Mattresses can be returned for refund (after 30 day minimum trial).
- Fees: A 15% return fee + $200 for return shipping is deducted from the amount credited for returns.
- Notes: The iComfort/iSeries In-Home Trial Period is 120 nights. For other products, Serta's Comfort Assurance program is 45 nights.
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Here are the delivery terms for mattresses purchased from the Serta website:
- Policy: Delivery available - Free with any mattress purchase
- Set-up: Set-up provided free with delivery
- Removal: Removal of old mattress provided free with delivery
- Notes: Free “white glove” (2-person) delivery to your bedroom. Includes unpacking and set-up as well as removal of packaging and old bedding if needed.
Expert Q&A
See questions from other mattress buyersOther Models from Serta
Additional Information
General Description
- 1” PerfectPure Fiber.
- 0.5” Serta Support Foam, strikes the ideal balance of cushioning and support.
- 0.5” Serta Support Foam.
- 1” Cool Twist Gel Memory Foam, keeps you comfortably cool.
- 1” Serta Support Foam.
- 850 3 Zoned Coil System.
- 1" Serta Balanced Support Pad, strikes the ideal balance of cushioning and support, no matter how firm or plush you prefer your mattress.
About This Model
| Status | Active (released 2023) |
|---|---|
| Manufacturer | Serta |
| Line | Serta Perfect Sleeper |
| Collection | Serta Perfect Sleeper Innerspring Ultimate |
| Comfort Level | Ultra Firm |
| Surface Type | Tight Top |
| Support Type | Innerspring |
| Build Details |
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Editor's Note(s)
- On the Serta website, this model is called the Serta Perfect Sleeper Ultimate Extra Firm.
Corrections
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