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Extra Firm
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On Sale
Overview
- SleepMatch: red
Beautyrest Black Series Three Extra Firm Mattress 14.25"
- 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 Extra Firm Mattress 14.25" — Twin XL
Extra-firm coil support keeps spine lifted all night
Triple-Stranded Pocketed Coil® isolates motion completely
Cooling yarn and Micro Diamond™ foam pull heat away
Self-Response™ Latex adapts instantly to pressure and movement
Tight-top surface holds position without any sinking feel
The Beautyrest Black Series Three Extra Firm Mattress 14.25" is an innerspring mattress built for back and stomach sleepers who need firm mattress for back pain relief without sacrificing the refined feel of a luxury sleep system. This is Beautyrest's most advanced coil architecture in a tight-top profile, and it earns that claim through feel, not just spec count. Every layer is chosen to hold the body in correct alignment from the moment you lie down. If you've been waking up with lower back tension or hip discomfort from a mattress that lets you sink, stop by any Mancini's Sleepworld location and our sleep specialists will put this next to every competing option so you can feel the difference for yourself.
COMFORT AND FEEL: Extra-firm surface with a buoyant latex lift and zero sinking sensation.
SIZE: This Twin XL sized mattress is a natural fit for taller solo sleepers, college students, and single-sleeper guest rooms where length matters.
BEST SLEEP MATCH: Back and stomach sleepers who prefer an extra-firm feel will find this mattress holds the hips level and the lumbar supported all night, making it easier to wake up without stiffness.
BEST FOR: Ideal for sleepers who need strong lumbar support, tend to overheat through the night, or want a firm mattress for back sleepers that doesn't feel punishing.
CONSTRUCTION SPECIFICATIONS: Triple-Stranded Pocketed Coil® Technology works head-to-toe, moving independently under each part of the body. Cooling yarn woven into the surface works with Micro Diamond™ Memory Foam to move heat away from the body. Self-Response™ Latex responds instantly, adding a buoyant pressure-relief layer without softening the overall firmness profile. Foam meets CertiPUR-US standards.
SETUP AND COMPATIBILITY: Works on a platform frame, adjustable base, or box spring with no tools required. Delivered flat with in-home professional setup available.
NOT A FIT FOR: Dedicated side sleepers or anyone who prefers a plush or medium feel — this extra-firm profile is built for those who want to sleep on the mattress, not in it.
YOUR SLEEP, BACKED BY US
Every mattress purchased at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Best Price Guarantee, so you know you're getting real value. Add a premium mattress protector at the time of purchase and you can extend that to a full 365 nights. We also offer free next-day delivery, flexible financing, and in-home professional setup. Better yet, come feel this mattress in person at any of our locations before you decide.
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 Extra Firm Mattress 14.25"
Features
- SKU: SIM-SE3-3XM-XF-24
- MPN: 700812259-1020
- GTIN: 889152663031
- Brand: Beautyrest
- Collection: Black
- Type: Innerspring
- Mattress In A Box: No
- Firmness: Extra Firm
- Height: 14.25
- Length: 79.5
- Width: 38
- Shipping Height: 14.25
- 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, Firm Comfort Foam, HD Firm Comfort Foam, Self-Response™ Latex, Micro Diamond™ Memory Foam
- 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
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