Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress, California King

4.6 (1,125)
Clearance
$1,212.30 (63% off) with code: HOME Sale $1,347.00$3,239.00
Size:Cal King

Type: Set with Standard Profile Split Box Spring

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Offers & perks
Free Box Spring
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68/mo.* suggested payments for 18-months totaling $1,212.30 with Macy's Card.

Product details

Web ID: 21339158
Featuring 825 density coils, this supportive mattress offers zoned comfort and pressure relief where you need it—with upgrades available for even more cooling and comfort.

  • 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 from technology that is plant-derived*
    • 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: 1160
    • 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
    • Made in the USA of imported and domestic parts
    • Woman Owned
    • 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 is widely praised for its exceptional comfort and support, providing a perfect balance of firmness and softness.
  • Customers consistently describe it as very comfortable, with the pillowtop adding an extra layer of plushness.
  • Many reviewers report experiencing improved sleep quality, reduced back pain, and feeling well-rested upon waking.
  • The mattress is also praised for its cooling properties, keeping sleepers comfortable throughout the night.
AI-generated summary from 1,124 customers reviews.
4.6/5

1,125 star ratings, 1,124 reviews

Write a Review
78.8% of reviews have 5 stars
887
11.6% of reviews have 4 stars
131
4.8% of reviews have 3 stars
54
2.0% of reviews have 2 stars
23
2.7% of reviews have 1 star
30

231 customer images

1,124 reviews
Andrea H
4 days ago

Perfectly Dreamy!

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

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
4 days ago

Best nights sleep ever!

Best nights sleep ever!

Customer review from Serta

Diane J
6 days ago

Comfy

Comfy and supportive mattress

Customer review from Serta

Daniel B
7 days ago

Great sleep

Soft yet supportive.

Customer review from Serta

James G
7 days ago

Serta Good Sleep

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

Customer review from Serta

Bruce B
7 days ago

Mattress

Super comfortable

Customer review from Serta

Barbara O
9 days ago

Quality

Nice firm and great quality

Customer review from Serta

Cynthia A
9 days ago

Twin Blue Lagoon Plush

Beautiful comfy mattress for guestroom.

Customer review from Serta