Shop King Extra Firm Mattresses

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The extra firm king mattress, measuring 76" wide by 80" long, is large enough for a couple to sleep comfortably, even with a small child or pet. Extra firm mattresses are best for support, as the added stiffness allows for proper spine alignment. With most of the pressure on the bones, muscles are freed, allowing arteries and veins to relax and improving circulation. For stomach and back sleepers, extra firm mattresses can't be beat.

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  • ONLY AT MATTRESS FIRM

    $767.36 - $1,151.36 $1,199.00 - $1,799.0 (up to 36% off)
     or as low as  $43.71/mo All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $999.00, excluding tax and delivery charges, for 24 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • WEB EXCLUSIVE

    $219.50 - $299.50 $439.00 - $599.0 (up to 50% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • $1,999.20 - $2,719.20 $2,499.00 - $3,399.0 (up to 20% off)
     or as low as  $41.65/mo All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1,999.00, excluding tax and delivery charges, for 48 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • ONLY AT MATTRESS FIRM

    $1,149.00 - $1,999.00
     or as low as  $36.64/mo All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $1,299.00, excluding tax and delivery charges, for 36 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • NEW AT MATTRESS FIRM

    $125.00 - $150.00