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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
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Description
Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring MattressWhy We Love This Perfect Sleeper Cobalt Calm Extra Firm is an extra firm, supportive mattress with a 12 profile, essential cooling features, and targeted support. Featuring an 825 coil density system, this classic quilted top mattress offers zoned comfort, pressure relief, and memory foams that contour your body. Cool feel fabric a luxurious, breathable cover with a cool to the touch sensation from technology that is plant derived. Our biobased phase
Why We Love This
Perfect Sleeper® Cobalt Calm Extra Firm is an extra-firm, supportive mattress with a 12” profile, essential cooling features, and targeted support. Featuring an 825-coil density system, this classic quilted-top mattress offers zoned comfort, pressure relief, and memory foams that contour your body.
- Cool feel™ fabric - a luxurious, breathable cover with a cool-to-the-touch sensation from technology that is plant-derived. Our biobased phase change material consists of 53% biobased content and is certified through the usda biopreferred® program.
- 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.
- Cool twist® gel memory foam - this breathable, gel-infused memory foam gently cradles your body while promoting enhanced airflow.
- 850 edition custom 3 zoned support coil system. This system of individually wrapped coils provides contouring, cradling support from edge-to-edge, minimizing the impact of your partner’s movements
- Proudly 100% U.S.A. assembled
- An Extra Firm mattress gives the sensation of lying on top of the mattress with little give
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Very Comfortable
Size: 9, Color: Chestnut, Size: 9, Color: Chestnut
Good quality and very comfortable. Sizing is accurate.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
★★★★★ 4
Cute - change footbed please
Size: 8.5, Color: Dense Smoke
These are so comfy and fit my usually 8.5 foot great. It's the footbed of UGGs that I keep hoping they'll change. It's like our memory foam mattress - cushy and great UNTIL THE HEAT comes! Then it's a no for this hot 65 yo G'ma!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 3
No me quedaron
Size: 8, Color: Dense Smoke
No son del # vienen más pequeños
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Super fun!
Size: 8.5, Color: Red Pepper
These are so fantastic! The color is amazing! It is a bit on the tomato-red side of the color-wheel. The fit is great. They are comfortable from the 1st step. Easy to walk in.
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Reviewed in the United States on March 17, 2026
★★★★★ 1
Velcro strap non durable.
Size: 10.5 Little Kid, Color: Oltremare
The Velcro strap stop working after using the shoes for only less than 2 month.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 19, 2025
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