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Mattress Firm is taking an extra 25% off Select King Mattresses with coupon code KINGS25 in cart. Shipping is free.

The prices below are after code. Highlights include (to add to cart, you may have to select another size in the dropdown menu then return to King size):

  • Serta Perfect Sleeper Elkins II 11" Plush Euro Top Mattress for $375
  • Beautyrest Silver BRS900 11.75" Medium Firm Mattress (pictured) for $404
  • Beautyrest BR800 11.25" Firm Mattress for $412
  • Beautyrest Silver BRS900 13.75" Extra Firm Mattress for $562