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Black® K-Class 15.75" Firm Pillow Top Mattress
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Beautyrest Black® K-Class 15.75" Firm Pillow Top Mattress

143812P
To Check Availability
    Helps With
    Acid Reflux icon
    Acid Reflux
    Bed Partner icon
    Bed Partner
    Pain icon
    Pain
    Sleep Apnea icon
    Sleep Apnea
    Snoring icon
    Snoring
    Temperature icon
    Temperature
    Toss And Turn icon
    Toss And Turn
    About Sleep Disruptors

    Overview

    Elevate your sleep to a luxurious reward night after night. As the premier offering in our most advanced collection yet, Beautyrest Black® K-Class now offers up to 21% more support where your body needs it the most.* With help from our new plant-based cooling technology, the collection provides up to 18% more cooling power to keep you comfortable as you fall asleep and all night long.** In addition to our support and cooling systems, Beautyrest Black® K-Class includes comfort, pressure-relieving and support upgrades as well as 10X more memory foam*** compared to Beautyrest Black® L-Class and C-Class models for our most comfortable mattress ever. A luxurious layer made with silk, alpaca and cashmere provides unmatched comfort and breathability while Self-Response™ Latex ensures individualized support for different parts of your body. Lasty, 2000 micro-coils add an additional layer to our Premier Support System and provide precise conformability. These innovative features are paired with an all-new modern design to create a first-class sleep experience that will leave you feeling invigorated to take on your day.

    *in the center-third of mattress, exact percentage varies by model
    **vs. Harmony Lux Collection for the first 20 minutes
    ***by weight

    Compare the Collection

    Mattress Firm offers one of the largest selections of mattresses to choose from. With a curated assortment of brands and products at every price point, you are sure to find the best mattress for your sleep needs.

    • Price
    • Deliver By
    • Comfort
    • Best For
    • Mattress Type
    • Height
    • Cooling Technology iconCooling Technology
    • Craftsmanship iconCraftsmanship
    • Durability iconDurability
    • Motion Separation iconMotion Separation
    • Pressure Relief iconPressure Relief
    • Support iconSupport
    • Adjustable Base Friendly iconAdjustable Base Friendly
    • Breathable iconBreathable
    Beautyrest Black® K-Class 15.75" Firm Pillow Top Mattress
    $4699
    Comfort

    Firm

    Firm icon
    Best For

    --

    Mattress Type

    Innerspring

    Height

    15.75"

    Mattributes

    Cooling Technology
    Craftsmanship
    Durability
    Motion Separation
    Pressure Relief
    Support
    Adjustable Base Friendly
    YES
    Breathable
    YES
    Shop Now
    Beautyrest Black® C-Class 16" Plush Pillow Top Mattress
    $3999
    Comfort

    Plush

    Plush icon
    Best For

    Side Sleepers

    Mattress Type

    Innerspring

    Height

    16"

    Mattributes

    Cooling Technology
    Craftsmanship
    Durability
    Motion Separation
    Pressure Relief
    Support
    Adjustable Base Friendly
    YES
    Breathable
    YES
    Shop Now
    Beautyrest Black® C-Class 13.75" Medium Mattress
    $3599
    Comfort

    Medium

    Medium icon
    Best For

    Side, Stomach and Back Sleepers

    Mattress Type

    Innerspring

    Height

    13.75"

    Mattributes

    Cooling Technology
    Craftsmanship
    Durability
    Motion Separation
    Pressure Relief
    Support
    Adjustable Base Friendly
    YES
    Breathable
    YES
    Shop Now
    Beautyrest Black® C-Class 14.25" Medium Pillow Top Mattress
    $3999
    Comfort

    Medium

    Medium icon
    Best For

    Side, Stomach and Back Sleepers

    Mattress Type

    Innerspring

    Height

    14.25"

    Mattributes

    Cooling Technology
    Craftsmanship
    Durability
    Motion Separation
    Pressure Relief
    Support
    Adjustable Base Friendly
    YES
    Breathable
    YES
    Shop Now
    Beautyrest Black® C-Class 14.5" Plush Mattress
    $3599
    Comfort

    Plush

    Plush icon
    Best For

    Side Sleepers

    Mattress Type

    Innerspring

    Height

    14.5"

    Mattributes

    Cooling Technology
    Craftsmanship
    Durability
    Motion Separation
    Pressure Relief
    Support
    Adjustable Base Friendly
    YES
    Breathable
    YES
    Shop Now

    Need help deciding? Talk to a Sleep Expert®

    Our Sleep Experts® are available in-store, online or by phone or chat to help find your perfect mattress.

    Benefits

    Pressure Relief icon image
    Pressure Relief
    9/10 Excellent
    Pressure relief can alleviate aches, stiffness, pain, and sleep apnea by keeping pressure on the mattress consistent across the entire bed.
    Pressure relief can alleviate aches, stiffness, pain, and sleep apnea by keeping pressure on the mattress consistent across the entire bed.
    Cooling Technology icon image
    Cooling Technology
    7/10 Good
    Temperature-regulating components and materials draw heat away from the body to create a cool and comfortable sleep surface.
    Temperature-regulating components and materials draw heat away from the body to create a cool and comfortable sleep surface.
    Motion Separation icon image
    Motion Separation
    9/10 Excellent
    The goal of motion separation is to isolate movement, helping to reduce what you feel (like your partner tossing and turning) and offer pressure relief to your shoulders, hips, and back.
    The goal of motion separation is to isolate movement, helping to reduce what you feel (like your partner tossing and turning) and offer pressure relief to your shoulders, hips, and back.
    Support icon image
    Support
    9/10 Excellent
    Proper support from your mattress can alleviate common sleep problems from snoring to soreness to sleep apnea as it distributes your weight evenly across the mattress and maintains proper joint and spine alignment.
    Proper support from your mattress can alleviate common sleep problems from snoring to soreness to sleep apnea as it distributes your weight evenly across the mattress and maintains proper joint and spine alignment.
    Breathable icon image
    Breathable
    Breathable materials regulate body temperature and prevent heat buildup to create a cooler sleep experience.
    Breathable materials regulate body temperature and prevent heat buildup to create a cooler sleep experience.
    Adjustable Base Friendly icon image
    Adjustable Base Friendly
    Elevating the top and/or bottom of your mattress provides targeted support to help reduce snoring, provide pain relief and make reading and watching TV more comfortable.
    Elevating the top and/or bottom of your mattress provides targeted support to help reduce snoring, provide pain relief and make reading and watching TV more comfortable.
    Specifications
    {"iconFeatures":[{"url":"https://images-us-prod.cms.commerce.dynamics.com/cms/api/cncgmclkfv/imageFileData/MAfErv?pubver=1","text":"FIRM COMFORT"},{"url":"https://images-us-prod.cms.dynamics365commerce.ms/cms/api/cncgmclkfv/imageFileData/MAmwZg?pubver=1","text":"MATTRESS HEIGHT"}],"listedFeatures":["T3 Pocketed Coil® Technology & 2K Nano Coils:A system of 2,000 Nano Coils and Zoned T3 Pocketed Coil® Technology conforms to your body’s unique shape and provides up to 21% more support where you need it most.","Self-Response™ Latex:Ensures individualized support for different parts of your body. Plus, it provides welcome comfort and relief to shoulders and hips.","BlackICE™ with Plant-Based Cooling:The advanced temperature management system keeps you cool and comfortable to help you fall asleep and stay asleep all night.","Antimicrobial Mattress Protection:Keeps mattress fresh and clean from odor causing bacteria*.","Split-Sizes available to purchase via Call (877-384-2903)/Chat or In-Store"],"mattressBreakdown":{"Quilting Layer":["Anti-Microbial Protection*","BlackICE™ with Plant-Based Cooling Technology","¾\" SurfaceTouch™️ Gel Memory Foam"],"Comfort Layer":["½\" Firm Comfort Foam","3\" Dynamic Response™️ Memory Foam","1\ "Comfort layer made with Alpaca, Cashmere, and Silk Fibers","½\" Self-Response™️ Latex"],"Support System":["1\" 2K Nano Coil","Zoned T3 Pocketed Coil® Technology","Energy Foam","BeautyEdge®"]}}
    About beautyrest
    The Beautyrest collection is leading the industry in sleep innovations and construction technology with a wide range of products to fit everyone’s needs. Beautyrest offers luxury beds that feature gel-infused foam layers, cooling technology and patented pocketed coil technology for a restorative sleep experience like no other. Plus, there are more budget-friendly Beautyrest mattresses that prove great quality can also be found at a great value. In addition to mattresses, Beautyrest offers bed accessories like bed frames, baby and toddler furniture, pillows and crib mattresses.
    Delivery & Shipping

    Free Delivery

    Includes transportation, mileage and tolls

    Home protection from outside direct and elements

    Delivery where you want - front door, side door or even garage

    Contactless delivery, meaning we won’t enter your home

    Regular $24.99

    NOW FREE

    Mattress Setup

    and Haul Away

    Includes all Free Delivery services plus:

    New mattress and box spring setup

    Removal of packaging material from purchased item(s) & removal of old mattress set (equal to the number of pieces purchased)

    Three maximum flight of stairs purchased items can be carried

    $99.99

    Mattress Setup and

    Haul Away / Adj Base

    Includes all Mattress Setup and Haul Away

    services plus:

    Five maximum flight of stairs purchased items can be carried

    Delivery and setup of up to three mattress sets

    Setup of adjustable bases purchased from Mattress Firm

    $149.99

    Warranty
    No content available