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Firm
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On Sale
Overview
- SleepMatch: red
Beautyrest Black Series Three Firm Mattress 15"
- Head-to-toe Triple-Stranded Pocketed Coil® Technology offers our most advanced level of individualized support and motion separation so you can rest undisturbed.
- Cooling yarn woven into the mattress surface tops a layer of specialized vertical fibers in an advanced feature designed to help transfer heat away from the body all night.
- A premium memory foam infused with diamond particles is designed to help move heat away from the body for a cool sleep.
- A layer of specialized foam is quilted into the sleep surface to unlock immediate advanced pressure relief.
- Ventilated latex layer maximizes airflow while contouring and conforming to your body for responsive pressure relief.
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In Stock
Overview
Beautyrest Black Series Three Firm Mattress 15" Twin XL
Firm feel with responsive pressure relief
Triple-Stranded Pocketed Coil® Technology minimizes motion transfer
Sleep Climate™ Technology draws heat away all night
Self-Response™ Latex conforms and maximizes airflow
Upgraded cooling cover built for temperature-sensitive sleepers
The Beautyrest Black® Series Three Firm Mattress 15" is a firm mattress built for back and stomach sleepers who want structured support without giving up pressure relief. It builds on everything in the Series One and Series Two with an upgraded cooling cover and a ventilated latex layer that isn't found lower in the lineup. The coil system works head to toe, responding individually to your body so weight distributes evenly and a restless partner stays on their side of the bed. If you'd like to feel how this compares in person, any Mancini's Sleepworld sleep specialist can place it right next to competing options so you can judge the difference yourself.
COMFORT AND FEEL: Firm support with a responsive, on-top-of-the-mattress feel and even weight distribution.
SIZE: This Twin XL sized mattress is ideal for taller individuals, growing teens, and solo sleepers who need the extra length without a larger footprint.
BEST SLEEP MATCH: Built for back and stomach sleepers who want a firm mattress for back pain relief. The flat, stable surface keeps the spine aligned and stops the hips from sinking in.
BEST FOR: Ideal for sleepers who run warm at night, need stable lumbar support, or wake up with tension across the lower back or hips.
CONSTRUCTION SPECIFICATIONS: The cooling yarn woven into the quilted surface sits above a layer of vertical fibers designed to move heat away from the body. Micro Diamond™ Memory Foam draws warmth away while a SurfaceTouch™ Gel Memory Foam layer quilted into the surface delivers immediate pressure relief. A Self-Response™ Latex layer adds ventilated, responsive contouring. The Triple-Stranded Pocketed Coil® Technology provides the foundation. All foam layers are CertiPUR-US® certified.
SETUP AND COMPATIBILITY: Arrives flat and delivered with professional in-home setup included. Compatible with adjustable bases, platform frames, and box spring foundations.
NOT A FIT FOR: Side sleepers who need significant hip and shoulder cushioning may find the firm feel too unyielding. Not recommended for sleepers who prefer a deep, plush sink-in sensation.
YOUR SLEEP, BACKED BY US
Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee, our Best Price Guarantee, and free next-day delivery with professional in-home setup available. Want a full year to be certain? Add a premium mattress protector at the time of purchase and your guarantee extends to 365 nights. Stop by any Mancini's Sleepworld location to try this mattress before you buy, and let our sleep specialists help you find the right fit. Flexible financing options are available.
Features
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Suitable For Adjustable Base
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Motion Separation
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Cooling Technology
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Edge Support
- SleepMatch: red

Beautyrest Black Series Three Firm Mattress 15"
Features
- SKU: SIM-SE3-3XM-FM-24
- MPN: 700812167-1020
- GTIN: 889152657757
- Brand: Beautyrest
- Collection: Black
- Type: Innerspring
- Mattress In A Box: No
- Firmness: Firm
- Height: 15
- Length: 79.5
- Width: 38
- Shipping Height: 15
- Shipping Width: 79.5
- Shipping Length: 39
- Warranty: 10-Year Limited
- Cover Material: Polyester / Polyamide blend
- Quilting Layers: Sleep Climate™ Technology
- Comfort Layers: SurfaceTouch™ Gel Memory Foam, SurfaceTouch™ Gel Memory Foam, AirCool® HD Foam, Micro Diamond™ Memory Foam, HD Firm Comfort Foam, Self-Response™ Latex
- Support System: Triple-Stranded Pocketed Coil®, Medium Comfort Foam Base Layer, BeautyEdge® encasement support
Specification
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes
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Cooling Technology: Yes
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Edge Support: Yes





