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    Mattress Comparison
    Beautyrest Black K-Class mattress

    Beautyrest Black K-Class

    VS
    Beautyrest Black C-Class mattress

    Beautyrest Black C-Class

    Beautyrest Black K-Class vs. Beautyrest Black C-Class

    Side-by-side comparison of the Beautyrest Black K-Class (Hybrid (Pillow Top)) and Beautyrest Black C-Class (Hybrid). Compare comfort, cooling, support, value and more — based on our lab testing.

    By Sleep Sage Editorial Team

    Side-by-side mattress testing · 144+ comparisons published

    Updated May 2026
    Category
    Beautyrest Black K-Class
    Beautyrest Black C-Class
    Comfort
    9.5/10
    9/10
    Support
    8.8/10
    9.2/10
    Cooling
    9.3/10
    9.4/10
    Edge Support
    9.2/10
    9.3/10
    Motion Isolation
    9/10
    8.9/10
    Durability
    9.3/10
    9.2/10
    Value
    8/10
    8.3/10

    Quick Specs Comparison

    Spec
    Beautyrest Black K-Class
    Beautyrest Black C-Class
    Price (Queen)
    $3,499
    $2,999
    Type
    Hybrid (Pillow Top)
    Hybrid
    Firmness
    4/10
    6/10
    Height
    16.5 inches
    14.5 inches
    Trial
    100 nights
    100 nights
    Warranty
    10 years
    10 years
    Shipping
    Free white glove delivery
    Free white glove delivery

    Key Advantages

    Why Choose Beautyrest Black K-Class

    • Incredibly plush pillow-top comfort
    • BlackICE 4.0 cooling on BOTH sides
    • 16.5" height — most luxurious profile

    Why Choose Beautyrest Black C-Class

    • Best cooling in the Black lineup
    • Versatile medium-firm feel suits most sleepers
    • BlackICE 4.0 + RightTemp foam combo

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    More Resources

    Brands behind these picks

    Before you buy, read the brand: construction, pricing bands, trial and warranty terms, and how each company's lineup performed in our Encinitas lab.

    Browse every mattress brand we cover

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