Beautyrest Black® K-Class 15.75" Firm Pillow Top Mattress
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
Craftsmanship
Durability
Motion Separation
Pressure Relief
Support
Adjustable Base Friendly
Breathable
Firm
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Innerspring
15.75"
Mattributes
Cooling Technology
Craftsmanship
Durability
Motion Separation
Pressure Relief
Support
Adjustable Base Friendly
YESBreathable
YESPlush
Side Sleepers
Innerspring
16"
Mattributes
Cooling Technology
Craftsmanship
Durability
Motion Separation
Pressure Relief
Support
Adjustable Base Friendly
YESBreathable
YESMedium
Side, Stomach and Back Sleepers
Innerspring
13.75"
Mattributes
Cooling Technology
Craftsmanship
Durability
Motion Separation
Pressure Relief
Support
Adjustable Base Friendly
YESBreathable
YESNeed 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
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