What is the difference between the white Serta cobalt calm extra firm and the blue Serta cobalt calm extra firm

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).

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.

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.

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.

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 with delivery - Extra fee applies (+$150.00)
• Removal: Removal of old mattress provided with delivery - Extra fee applies
• Notes: Optional white glove delivery service includes set up, as well as the removal of packaging, your old mattress, and the box spring (if applicable).