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Flat Foundation 9", Twin XL

Prices as of September 26, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Macy's price tracker

14-day low
$240.00
Sep 13 · Macy's
Best price
$240.00
−0% vs high
14-day high
$240.00
All stores
$240$240$240
Sep 13Sep 26
  • Macy's
Lowest in 14 days: $240.00 at Macy's. Highest: $240.00. Current best is 0% below the 14-day high.

About this product

The Stearns & Foster 9" Flat Foundation is a twin extra long mattress foundation designed for use with a Twin XL mattress. Constructed with a steel grid and wood frame, it provides sturdy support and measures approximately 79" x 38" x 9". The foundation meets federal fire-retardant safety standards and comes with a 10-year manufacturer's warranty. It is made in the USA using imported and domestic parts and is not compatible with adjustable bed frames.

  • Twin XL size: 79" x 38" x 9"
  • Steel grid with wood frame
  • Meets federal fire-retardant standard
  • 10-year manufacturer warranty
  • Made in USA
  • Not compatible with adjustable beds

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Flat Foundation 9", Twin XL — Price Tracker & History