Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress Set, Queen Split

4.6 (1,138)
Clearance
$852.30 (65% off) with code: HOME Sale $947.00$2,469.00
Size:Split Queen

Type: Set with Low Profile Box Spring

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Offers & perks
Free Box Spring
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72/mo.* suggested payments for 12-months totaling $852.30 with Macy's Card.

Product details

Web ID: 21339158
Featuring a 3-zoned coil design, Serta's Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress offers significant pressure relief and exceptional support where you need it, with a Cool Twist® Gel Memory Foam that contours to your body.

  • Product Features

    • Available in 9" standard or 6" low profile foundations
    • Top type: tight top
    • Mattress type: innerspring
    • 850 Edition Custom 3-zoned support coil system is a system of individually wrapped coils that provides contouring and cradling support from edge-to-edge, minimizing the impact of your partner's movements
    • Cool Twist® Gel Memory Foam is a breathable, gel-infused memory foam that gently cradles your body while promoting enhanced airflow
    • CoolFeel™ Fabric is a luxurious, breathable cover with a cool-to-the-touch sensation
    • Antimicrobial Mattress Protection keeps your mattress fresh and clean from odor causing bacteria (this product protects the mattress but does not protect users against bacteria, viruses, germs or other disease organisms)
    • Coil count: 850
    • The Serta Perfect Sleeper Foundation, constructed of wood and metal, provides the perfect support for your Serta mattress and is designed to provide durability and long-lasting comfort
    • Compatible with an adjustable bed
    • Warranty: 10-year non-prorated warranty
    • Meets federal fire-retardant safety standard
    • This box spring arrives in two pieces. Split box springs make it easier to maneuver through narrow stairwells, elevators and door frames.
    • Made in the USA of imported and domestic parts
    • Woman Owned
    • Certified flexible polyurethane foams meet CertiPUR-US® program standards for content, emissions and durability, and are analyzed by independent, accredited testing laboratories
    • Request warranty information

  • Shipping & Returns

    • Shipping Method: Scheduled Delivery
    • For complete details, see our Shipping and Returns policies.

Ratings & Reviews

Here's what customers think
  • The mattress provides a comfortable and supportive sleep experience, with a medium firmness that offers the right balance of cushioning and support.
  • Customers report waking up feeling refreshed and without back pain.
  • The pillowtop feature is praised for adding an extra layer of comfort.
AI-generated summary from 1,138 customers reviews.
4.6/5

1,138 star ratings & reviews

Write a Review
79.1% of reviews have 5 stars
900
11.5% of reviews have 4 stars
131
4.8% of reviews have 3 stars
55
2.0% of reviews have 2 stars
23
2.5% of reviews have 1 star
29

232 customer images

1,138 reviews
Laura E
5 days ago

New mattress

Very comfortable and good support

Customer review from Serta

Andrea H
5 days ago

Perfectly Dreamy!

Great mattress! So comfortable with the support I need for a good nights rest.

Customer review from Serta

Cindy N
5 days ago

Mattress review

Purchased December 27,3025 and delivered 1/8/26. It is beginning to sink down in area beneath buttocks area. I weigh 169and husband weighs 254 and only had it for three weeks. Other than that it’s comfortable. Concerned if will continue to sink further.

Customer review from Serta

Serta Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress Set, Full This review is from Serta Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress Set, Full
Beverly R
5 days ago

Best nights sleep ever!

Best nights sleep ever!

Customer review from Serta

Diane J
7 days ago

Comfy

Comfy and supportive mattress

Customer review from Serta

Daniel B
8 days ago

Great sleep

Soft yet supportive.

Customer review from Serta

James G
8 days ago

Serta Good Sleep

Firm mattress provides a restful and satisfying sleep - aches melt away.

Customer review from Serta

Bruce B
8 days ago

Mattress

Super comfortable

Customer review from Serta