Serta iSeries Tidwell 11.8” Plush Mattress


Product Code: mfiV000078302
$1,349.99 - $1,899.99
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  • Advanced gel memory foam technology
  • Advanced innerspring support system
  • Features Serta’s new MicroFlex™ Coil
  • MicroFlex™ Coil
  • Custom Support® Individual Advantage™
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  • Size: King

    When it comes to mattresses, one size definitely doesn’t fit all. The mattress should be longer than the tallest person sleeping on it. The bed width should allow enough space to fold your arms behind your head without going beyond the mattress edge or touching your partner’s elbows (for two adults, we recommend either a queen or a king).

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Arrives in 7-10 Days


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Additional Information

Overview & Specs

Serta iSeries Tidwell 11.8” Plush Mattress
Not Available in Stores

The exclusive Serta® iSeries® hybrid mattresses combine Serta’s advanced gel memory foam technology with an advanced innerspring support system. Plus, these are the only mattresses to feature Serta’s new MicroFlex™ Coil, a breakthrough micro-coil system designed to deliver enhanced support. The Tidwell Plush model combines these technologies with the familiar look and feel of a traditional plush mattress.
    • Comfort Type: Plush

      Mattress Height: 11.8"

      Mattress Layer Breakdown:

      Quilting Layers:
      • FireBlocker® Fiber

      Comfort Layers:
      • 2.5" Serta® PillowSoft® Foam
      • ¾" Cool Action™ Dual Effects® Gel Memory Foam

      Support System:
      • MicroFlex™ Coil
      • Custom Support® Individual Advantage™
    • • Twin - 39 W x 75 D
      • Twin XL - 39 W x 80 D
      • Full - 54 W x 75 D
      • Queen - 60 W x 80 D
      • King - 76 W x 80 D
      • Cal King - 72 W x 84 D
Cooling Gel

Cooling Gel

Items delineated as “WEB ONLY SPECIAL” ship free with ground shipping and do not include in-home delivery or setup, nor do they qualify for Red Carpet Delivery.

PLEASE NOTE: Web-Only Simmons Beautyrest mattresses will ship free and include in-home delivery and setup. Furniture pieces will ship with Curbside LTL delivery unless otherwise specified.

Online orders of in-store items over $499 also qualify for free delivery, including Red Carpet Delivery for mattresses.

Red Carpet Delivery Details:

We guarantee your new mattress will be delivered within a designated 1 day delivery window, or your delivery is free. If your delivery is late, simply contact the store of your original purchase after signing the delivery manifest with the delivery time stamp and we will credit your account or mail a refund check for the price of your delivery fee within three weeks. Participation may vary. See store for details. Not applicable on all products. As part of our Red Carpet Delivery Service, we will contact you to schedule delivery whenever it's convenient for you. While we install your new mattress, we will also haul your old mattress away. *Not available in all areas. **Same day delivery available in stores and next day delivery available online.



Sometimes, even the highest quality products may show early signs of wear and tear, or have a manufacturing defect. Most products available at Mattress Firm are covered by a manufacturer’s warranty. Often people ask when they find damage to their mattress is, “Is this covered by the manufacturer’s warranty?” Warranties protect your purchase from defects in manufacturing, not from damage caused by use or normal wear and tear.

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