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Beautyrest Black L Class Extra Firm King Mattress

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Accidents Happen
With our comprehensive, 5-Year Platinum Protection Plan you won’t have to worry. It will give you peace of mind so you can thoroughly enjoy your purchase. What’s Covered?
Standard 5-Year Platinum Protection includes a basic, breathable mattress protector.
Premium Encasement 5-Year Platinum Protection includes an allergen-resistant 360° full mattress encasement.
Performance Moisture Wicking 5-Year Platinum Protection includes stay-dry, moisture-wicking mattress protector.
Performance Cooling 5-Year Platinum Protection includes a stay-cool, temperature-regulating mattress protector.
L: 80" x W: 76" x H: 13.8"
SKU: 466100129
$2,299.00 Select mattress and base options to see price.
Add to List
Based on your zip code 20146, this item can be delivered in 3-5 weeks.
In-Store Pickup
In-store pickup includes unlimited furniture items and can be available in most showrooms within a few days.
Current Sale Details
Today's Financing Offer
Features & Dimensions
For the utmost support and comfort, consider the Beautyrest® Black L Class Extra Firm king mattress. With T3 pocketed coil™ technology, you'll always feel like you're supported. Plus, the BlackICE™ 4.0 technology helps you sleep cool by drawing heat away from your body.
King Dimensions & Weights
Length: 80"
Width: 76"
Height: 13.8"
Weight: 126 lbs.
With 5" Low-Profile 1-pc or Split
Length: 80"
Width: 76"
Height: 18.8"
With 9" High-Profile 1-pc or Split
Length: 80"
Width: 76"
Height: 22.8"
Brand: Simmons Innerspring support
T3 pocketed coil™ technology

Quilt layer
BlackICE™ 4.0 fabric with SilkAIR™ fiber technology, .5" plush comfort foam and .5" firm comfort foam

Comfort layers
.5" Beautyrest® gel memory foam, 1" extra-firm foam, .5" gel touch foam and 1.5" EnergyFoam™ base layer

Edge support
BeautyEdge® foam encasement

Beautyrest® steel grid foundation

T3 Pocketed Coil® Technology
Three steel strands wound into one coil provides enhanced support, pressure relief and reduces motion

BlackICE™ 4.0 Technology
Cool to the touch layer draws heat away from your body and prevents heat build-up for a comfortable sleeping climate

Beautyrest® Gel Memory Foam
Exceptional pressure relief memory foam that contours to your body

Deep-Pocket Sheet
Mattress requires deep-pocketed sheets (sold separately)

Delivery & Shipping Back to Features
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Questions about delivery?
White-Glove Delivery Available
Your white-glove delivery experience includes:
  • Delivery in 3-5 weeks
  • Full furniture assembly and inspection
  • Perfect placement - tell us right where to set it
In-store pick-up also available
Mattress Only Delivery Fees for Ashburn, VA 20146
  • 10% of your cart subtotal (excludes free shipping labeled products)
  • $299.00 minimum delivery fee
  • $699.00 maximum delivery fee
Manufacturer Warranties
At Raymour & Flanigan, we stand behind our quality products. We are committed to upholding manufacturer warranties during their specified time frame. If furniture covered by a manufacturer's warranty is unable to be repaired during the warranty period, we will replace the damaged piece of furniture with the same model. If the same model is no longer available, you may choose a replacement item.

To ensure we provide you with the best customer service experience possible, please be aware of the following when you choose a replacement item:
1.) A Raymour & Flanigan store manager will do everything he or she can to ensure you're completely satisfied with your replacement item. Please be aware that if your replacement furniture's everyday selling price is greater than the original purchase price of the item being replaced, you will only be responsible for the cost of the difference plus applicable tax. If a less expensive item is selected, you will not be responsible for any additional cost.

2.) If your replacement item doesn't match the other piece(s) of the same collection you purchased at the same time and the other pieces are still covered by the manufacturer's warranty, we'll happily offer you a one-time option to replace the other piece(s) of your collection for a usage fee. The usage fee shall be equal to the greater of twenty percent (20%) of the original invoice price of the other pieces or two percent (2%) of the original invoice price of the other pieces for each month (or partial month) between the date of delivery and the date of your claim.

3.) To expedite your replacement, you must accept delivery of your replacement item within 10 days from the date we agree to replace your furniture.

4.) As an additional convenience, if your furniture needs to be serviced after the manufacturer's warranty expires, we can provide an in-home visit by one of our expert service technicians. Please contact our Customer Care Center to set up an appointment and receive information on applicable charges.
Use a protective mattress pad, included with your purchase of our 5-year protection plan. Vacuuming is the only recommended cleaning method.
Mattress Buying Guide Back to Features
We understand that buying a mattress is a hard decision and we want you to love your new mattress! Here are some tips and tricks we have gathered to help you make your decision. We also encourage you to go into a store to take our comfort test to make sure you are getting exactly what you need.


  • How much room do you really need?
  • Do you have enough room in your bedroom?
  • Will the mattress work with your current bed frame?
  • Try our room planner to see if everything will fit

Adjustable Bases


  • Offer virtually unlimited ergonomic rest positions for a more restful sleep
  • Some models feature memory buttons, massage options and wireless controls
  • Many are designed to fit within your existing bed frame

Adjustable Bases


Rest assured, split box springs offer all the support of a 1-piece. The main benefit of a split box spring is that it is easier to maneuver through tight passages and stairwells.

  • All king mattress sets come standard with a split box spring.
  • Most queen mattress sets are offered with the choice of a 1-piece or a split box spring.

Adjustable Bases


  • Offered in split and 1-piece styles
  • Offers added height if your mattress is not deep

Adjustable Bases


  • Offered in split and 1-piece styles
  • Offers less height if your mattress is very deep. Many of the new mattress styles are higher than older styles. It is important to measure all the pieces so you are comfortable getting in and out of your bed.

Adjustable Bases


  • Offered in split and 1-piece styles
  • Perfect for adding a little extra support for both bunk beds and platform beds.


For a person of average height, the mattress surface should be about 25" from the floor. Add bed frame height to the height of your mattress and subract your total from 25" to determine whether a high-profile or low-profile box spring is best for you.


  • Box spring, adjustable base or bunkie board is required.
  • Bed frame is generally 3"-4" from the floor.


  • Not made to accept a box spring or an adjustable base.
  • For extra support, a bunkie board can be used.
  • Bed frame is generally 9"-10" from the floor.

We want you to love your new mattress. With the purchase of our optional Platinum Protection Plan, you can opt to reselect a new mattress if you're not completely satisfied with your choice. (some conditions apply, please see details) Plus, rest assured—this plan also covers most stains and accidents for 5 years.
What's Covered? View Full Plan Details »

Sub Brand: Beautyrest Black
Mattress Type: Innerspring
Comfort: Extra Firm
Dimensions, Weights, & Coil Count
Length: 80"
Width: 76"
Height (mattress only): 13.8"
Product Reviews Back to Features
4.5 / 5.0
322 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
BeautyrestB. Blacck not
Our first week of sleep on our new Beautyrest Black was not as comfortable as we expected.
1.) Our mattress is not as firm as we hoped.
2.) The mattress has developed a hump in the middle.
3.) The cloth on the box spring was falling off after a few days.
4.) The metal frame was not the one we looked at in the store.
- it was not adjustable.
-The bed did not feel sturdy and was easily moved.

The things I liked;
- the gentleman that set the bed up were efficient, polite, and friendly.
- that it has a 10 year warranty because I don’t think it is going to last that long.

The bad things;
- I do not feel in any way that the mattress is worth the $2,778.00 that we paid.
- the degree of upgrade in the improvement of our sleep over the mattress that we had for 16 years is minimal.
- I feel little value. I do not think we got the quality improvement we expected and would not recommend d this mattress.
January 20, 2020
1 week ago
First, if you buy any mattress from R&F, purchase the protection plan for the mattress. It was presented to us as protection plan not a requirement should we be unhappy with the mattress within 30 days. We purchased a Beautyrest Black, L-class Extra-Firm King mattress based upon "testing" in the store. After laying on at least a half dozen mattresses here and another 6 at Mattress Firm, selected this one. In the store it was firm but has some "give" so that sleeping on your side was quite comfortable. It gets delivered and is hard as a board (literally like laying on a piece of plywood). The adjustable bed was assembled wrong (different story but corrected 4 days after delivery). We go into the store today to explore why the mattress is like a rock. Told give it a week it will soften up, and then are told "oh you didn't purchase the comfort protection plan". We explain it was presented as a protection plan against damage to the mattress (stains, tears, etc..) and we declined as that was not important. We were under the impression that you had 30 days to sleep on it and determine go or no-go (Mattress Firm gives you 120 days and then will charge you $120 plus a re-delivery fee so the total out of pocket there is $270). Told nope, if you decide you don't like it it will be 20% of purchase price plus a delivery fee ($120) so if we are still uncomfortable it is going to run us another $540 on top of the $3K already spent and since this is the most expensive mattress in the store, we wind up loosing even more. Sure wish our sales person had properly explained the 30-45 day comfort protection plan. Asked to add it to the order and told, nope not possible once delivered. Go to Mattress Firm!
January 15, 2020
Response from Raymour & Flanigan
Harris, we're very sorry to hear about this experience and would like to look into this for you. Could you e-mail your order details, contact information and a copy of your concerns to so we can better assist? Thank you!
January 20, 2020
Faith W
Beautyrest and Sealy Mattresses
Fantastic service. Got my delivery within 48 hours. 3 mattresses (1 king and 2 queen). Had an issue with a box spring -- replaced, no questions or issues! Highly satisfied customer! New mattresses that only my guests have slept on so far -- and happy so far!
December 30, 2019
1 month ago
Very satisfied with the purchase!
lWhen I first went into Raymour & Flanigan to look for a new king size mattress, I was recommended to try the beauty rest black. The first time I laid on it, I was about to fall asleep at that point!! So I new this was the mattress I wanted. The day it was delivered, and set up I laid on it and woke up 2hrs !. Thanks Raymour & Flanigan. Completely satisfied with the purchase.
December 27, 2019
1 month ago
We love the bed. And the staff at raymour and flanigan were a huge help
December 14, 2019
1 month ago
In one word excellent
November 16, 2019
2 months ago
So glad we bought it!
Great mattress. Firm, but comfortable. Feels really well built and durable. Definitely worth the price.
November 15, 2019
2 months ago
Much harder than it felt at the store
Although it felt comfortable in the store, this mattress was way too hard when it was in our home. We've been sleeping on it for a week with no change. I'm sure for some this may work but for us it's like sleeping on a board. In addition everytime either of us move the other feels it and wakes up. We will be exchanging this as soon as we can.
October 30, 2019
3 months ago
Great comfortable best ever mattress
October 17, 2019
3 months ago
Sweet dreams
This is our first Beautyresf mattress and we are very satisfied with it so far. It is very comfortable and just the right firmness.
September 15, 2019
5 months ago
A note about our reviews. Reviews and testimonials from others can be an important factor in making a decision to purchase from us. Raymour & Flanigan Furniture | Mattresses prints both solicited and unsolicited reviews from customers. Customers are eligible to receive an offer if they provide a review of a product purchased from us.
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