Serta 12" Interax Mattress - King 

by Serta | Item  #: 148338 | Model #:  43770-KG-WHT |
Serta 12
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About this item

The Interax™ mattress features an innovative, responsive foam technology for a feeling of weightlessness and a sense of sleeping more on the mattress than in it.


Three layers work together to provide custom comfort and ease of motion all night long, so that you wake up feeling well-rested and refreshed.

The top two layers together, provide a firm/medium feel without the traditional cradling of memory foam. Interax™ foam in the top layer reacts responsively to body pressure and movement. The middle layer of super-soft memory foam provides cushioning comfort and distributes body weight to prevent the pressure points that cause tossing and turning. The base foam ensures long-lasting durability and mattress stability, eliminating the need for rotating or flipping. It is finished with a luxurious quilted matelassé cover.


  • Premium, 3-layer design
  • 1 inch Interax™ foam for a more responsive, weightless feel
  • 1 inch of super-soft memory foam for gentle support
  • 10 inches of base foam for long-lasting durability and mattress stability
  • Evenly distributes body weight to alleviate painful pressure points that cause tossing and turning
  • Mattress holds its shape with no flipping or rotating required
  • Minimizes impact of sleep partner’s movements
  • Quilted matelassé cover
  • Feel: Firm/medium
  • Constructed to maintain shape without ever flipping or rotating
  • Foam made in the USA
  • Meets the requirements of 16 CFR Part 1633 - Federal flammability (open flame) standards

Assembled Country


Assembled Size

80"L x 76"W x 12"H

Component Country

USA And Imported



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Shipping Information

Standard - 2 to 6 business days

Premium - 2 to 4 business days

Express - 1 to 2 business days

Warranty Information

20 year limited

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