Twin XL Simmons Beautyrest Black Mariela Extra Firm 14 Inch Mattress + FREE $300 Visa Gift Card

Twin XL Simmons Beautyrest Black Mariela Extra Firm 14 Inch Mattress + FREE $300 Visa Gift Card

From $1,999.00

To $3,777.00






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Discontinued by the manufacturer

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Twin XL Simmons Beautyrest Black Mariela Extra Firm 14 Inch Mattress + FREE $300 Visa Gift Card
Twin XL Simmons Beautyrest Black Mariela Extra Firm 14 Inch Mattress + FREE $300 Visa Gift Card

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Expert Review

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Expert Review by Jed

The Beautyrest Black Mariela Extra Firm is the most luxurious extra firm mattress available from Beautyrest. If you're looking for the best in construction and support, and you enjoy a very dense overall feel, the Mariela Extra Firm may be perfect for you.

The quilt on the Mariela feels soft to the touch and includes Tencel fabrics to help regulate body temperature and moisture. The comfort padding layers are all high-quality and CertiPUR-US certified to meet the highest quality standards in bedding. Key comfort features include a layer of Black Ice Memory Foam, the newest comfort material in the Beautyrest line. This high-end comfort material contours to the body in order to reduce tossing and turning, and includes diamond particles as well as phase change material to draw heat away from the sleeping surface. Another key layer is Comfort Response Latex which helps create a healthier sleep environment by being anti-microbial and anti-dust mite. Back support comes from the top-of-the-line advanced pocketed coil system. This system uses alternating rows of 3-piece braided coils that provide the best in support in durability. The individually wrapped system means each coil works independently to contour to your body and help minimize the motion felt when one person moves. The 360-degree foam encased edge is sturdy and allows you to sleep all the way to the edge without noticing a big difference in comfort or support.

Overall, the Mariela is a well-made mattress and, while it may not be for everyone because of its extremely firm feel, it's one of the best choices Beautyrest has available.


Comfort This describes how a mattress feels. The Comfort Scale rating is based on how the cushioning materials conform to the body's shape. The higher the number the softer the mattress.

Quilt - Top of Mattress This is the outside cover on the top of the mattress. It covers and protects the comfort and support layers inside.

Comfort - Padding Layers This provides a cushioning layer between you and the support system in the bed. Different kinds of padding will provide different levels of comfort.

Correct Back Support System This is a general term used to describe how a mattress distributes and stabilizes body weight and maintains proper spinal alignment. Different materials provide different levels of support.

  • 850 Series Beautyrest Variformed Advance Pocketed Coil
  • Coil Gauge: 13.5/17
  • 360 Degree 3'' Foam Encased Edge Support System

Box Spring - Foundation (optional)

Warranty This tells you what kind of warranty you have and how long it will last. A typical warranty lasts about 10 years.

  • 10 year warranty against manufacturer's defects
  • No Flip, No Rotate
  • Non-prorated

Made In This tells you where your mattress is manufactured.

  • United States


  • MATT-903753, STD-903790, LP-903795


King14"76"80"156 lbs.
Cal King14"72"84"160 lbs.
Queen14"60"80"123 lbs.
Full14"53"75"103 lbs.
Twin XL14"38"80"79 lbs.
SizeCoil Count
Cal King1127
Twin XL530

Works With All Bed Types

Box Spring
Box Spring
Traditional Frames
Traditional Frames
Adjustable Bases
Adjustable Bases

Your mattress purchase is fully compatible with all modern support systems, including adjustable base, platform bed, box spring/foundation, even the floor!

Customer Reviews

Average Review

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Xsensor Overview

We test and measure body pressure on each mattress using sophisticated technology. We then provide you a personal recommendation.

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Comfort Depth Overview

See how far you'll sink into our mattresses - see how they'll feel. With our Comfort Depth measurements you'll know how a mattress will feel.

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Delivery Info

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Delivery Options & Timing:
Free In-Home Setup & Removal
  1. TIMING: You'll receive your mattress in about 4 to 6 weeks anywhere in the continental 48 states that's road accessible. Check your zip code for an estimated delivery date.
  2. IN-HOME WHITE GLOVE DELIVERY: It's super easy; the delivery team will bring in and place your new mattress in your bedroom unpack it and take away the packaging. You can also add mattress removal for free when you select that option online. (Delivery is up to 2 flights of stairs. Additional arrangements are subject to charge by the delivery carrier.)
  3. SCHEDULING DELIVERY: You'll be contacted by our carrier to schedule your delivery. Someone must be home to accept delivery.
  4. FURNITURE & BEDDING: Furniture & bedding deliver separately.
  5. WEEKEND OR EVENING DELIVERY: May be available for a nominal fee. Order by phone at 1-800-455-1052.
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Pick the Right


  • Sleep cooler through the night with DualCool Technology
  • Feel supported with 900 Series Pocketed Coils
  • Consistent comfort with the BeautyEdge Foam Encased Edge