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Shop California King Medium Mattresses

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Mattress Firm's incredible assortment of mattress brands, types, sizes, and comfort levels means you're sure to find the perfect mattress for you. Whether you're into a firm or plush feel, a memory foam or hybrid comfort, or a twin or California king size, we've got the bed for you.

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  • Trinidad 10.5” Medium Hybrid Mattress Trinidad 10.5” Medium Hybrid Mattress

    WEB SPECIAL

    Hampton and Rhodes Trinidad 10.5” Medium Hybrid Mattress
    Hampton and Rhodes Trinidad 10.5” Medium Hybrid Mattress
    $279.50 - $399.50 $559.00 - $799.00 (up to 50% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • 10" Medium Quilted Foam Mattress 10" Medium Quilted Foam Mattress

    FREE GIFTS†

    Sleepy's 10" Medium Quilted Foam Mattress
    Sleepy's 10" Medium Quilted Foam Mattress
    $330.39 - $699.19 $412.99 - $873.99 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • 10" Medium Quilted Gel Foam Mattress 10" Medium Quilted Gel Foam Mattress

    FREE GIFTS†

    Sleepy's 10" Medium Quilted Gel Foam Mattress
    Sleepy's 10" Medium Quilted Gel Foam Mattress
    $370.39 - $799.19 $462.99 - $998.99 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • liv Mattress liv Mattress

    FREE GIFTS†

    tulo liv Mattress
    tulo liv Mattress
    $390.00 - $590.00 $490.00 - $690.00 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • 11" Medium Memory Foam Mattress 11" Medium Memory Foam Mattress

    WEB SPECIAL

    Eclipse 11" Medium Memory Foam Mattress
    Eclipse 11" Medium Memory Foam Mattress
    $287.20 - $487.20 $359.00 - $609.00 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • Deluxe 14" Medium Memory Foam Mattress Deluxe 14" Medium Memory Foam Mattress

    FREE GIFTS†

    Eclipse Deluxe 14" Medium Memory Foam Mattress
    Eclipse Deluxe 14" Medium Memory Foam Mattress
    $327.20 - $567.20 $409.00 - $709.00 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • 9" Medium Memory Foam Mattress 9" Medium Memory Foam Mattress

    WEB SPECIAL

    Eclipse 9" Medium Memory Foam Mattress
    Eclipse 9" Medium Memory Foam Mattress
    $263.20 - $431.20 $329.00 - $539.00 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • 10" Medium Gel Memory Foam Mattress 10" Medium Gel Memory Foam Mattress

    WEB SPECIAL

    Eclipse 10" Medium Gel Memory Foam Mattress
    Eclipse 10" Medium Gel Memory Foam Mattress
    $287.20 - $487.20 $359.00 - $609.00 (up to 20% off)
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • Calm 9" Euro Top Memory Foam Mattress Calm 9" Euro Top Memory Foam Mattress

    FREE GIFTS†

    Sleepy's Calm 9" Euro Top Memory Foam Mattress
    Sleepy's Calm 9" Euro Top Memory Foam Mattress
    $349.00 - $549.00
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • iComfort Blue Touch 100 9.75" Gentle Firm Memory Foam Mattress iComfort Blue Touch 100 9.75" Gentle Firm Memory Foam Mattress

    Serta iComfort Blue Touch 100 9.75" Gentle Firm Memory Foam Mattress
    Serta iComfort Blue Touch 100 9.75" Gentle Firm Memory Foam Mattress
    $659.00 - $1,599.00
    Pay over  36 months!
    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
  • 10" Medium Mattress 10" Medium Mattress

    FREE GIFTS†

    tulo 10" Medium Mattress
    tulo 10" Medium Mattress
    $575.00 - $950.00
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH
  • .2 Mattress .2 Mattress

    FREE GIFTS†

    Purple .2 Mattress
    Purple .2 Mattress
    $1,299.00 - $1,899.00
    Pay over  36 months!
    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
  • LX640 13" Medium Plush Memory Foam Mattress LX640 13" Medium Plush Memory Foam Mattress

    FREE GIFTS†

    Dream Bed Lux LX640 13" Medium Plush Memory Foam Mattress
    Dream Bed Lux LX640 13" Medium Plush Memory Foam Mattress
    $2,899.00 - $3,899.00
    Pay over  60 months!
    All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $2,799.00, excluding tax and delivery charges, for 60 months at 0% APR*. Learn more.
    EXTRA FIRM FIRM MEDIUM PLUSH ULTRA PLUSH