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Wake up feeling refreshed and energized every morning on Serta's Perfect Day Calm Harbor Limited twin firm mattress. Crafted in detail to address the most common sleeping problems, the Calm Harbor mattress helps you wake up invigorated, revitalized and ready to be your best all day.
  • This is a mattress only; Additional accessories are sold separately
  • For the complete set you must order the mattress plus either the standard-height twin box spring (#93541) or the low profile twin box spring (#93542). Standard twin box spring height is 9 in.; the low-profile twin box spring height is 5 in.
  • Innerspring mattress
  • Mattress size: Twin
  • Comfort: Firm
  • Mattress height: 14 in.
  • Mattress color: White
  • Serta Comfort Foam provides superior comfort on the sleep surface for more sound and cushioned sleep
  • Coil density: 560
  • Total Edge Foam Encasement with border rod creates an edge-to-edge sleeping surface for more mattress stability and strength for more room to stretch
  • Advanced Comfort Quilt cushions every part of your body while drastically reducing pressure points
  • 5 Zoned Free Flex Innerspring is an advanced, exclusive system of single and double rows of coils that mirror the shape of your body to ensure proper spinal alignment for added support and better rest
  • Fire rating: FireBlocker Protection, a natural and synthetic fiber mattress fire retardant
  • Warranty: 20 year limited
  • Made in USA

Protection Agreements

One smart decision calls for another. Safeguard your new purchase with the best repair and replacement coverage in the business. A Sears Protection Agreement picks up where the limited manufacturer's warranty leaves off. Enjoy the peace of mind that comes from having a plan that delivers what it promises. (Learn More)
Choose your protection agreement:


Comfort Level Firm
Comfort Firm
Included with Item:
General Warranty 20 year limited
Comfort Firm
Product Overview:
Overall Dimensions L 74.5 in. x W 38 in. x H 14 in.
Package Quantity 1
Size Twin
Mattress Length (in.) 74.5
Coil Count 560
Mattress Height 14 in.
Mattress Width 38
Image Capture:
Mattress Item by Size Twin


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