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Extra Firm
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On Sale
Overview
- SleepMatch: red
Mancini's Sleepworld Onyx Extra Firm Mattress 13"
- Built for the stomach or back sleeper who needs real resistance underfoot|Gel-infused memory foam keeps surface temperature in check|Fabric-wrapped pocketed coils reduce motion transfer across the mattress|High-density upholstery-grade support layers resist long-term compression|Firm edge-to-edge perimeter holds its shape where you sit and sleep
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In Stock
Overview
Mancini's Sleepworld Onyx Extra Firm Mattress 13" Twin
The Mancini's Sleepworld Onyx Extra Firm Mattress 13" is an innerspring mattress built for back and stomach sleepers who need a firm mattress for back pain relief and won't settle for a surface that gives too much. At 13 inches tall, it layers active cooling at the quilt into a coil system that pushes back against the body rather than cradling it. The result is a mattress that keeps the spine in a neutral line from hip to shoulder. Stop by any Mancini's Sleepworld location and one of our sleep specialists will let you lie on this next to every competing option at the same firmness, so you feel exactly what extra firm means before you commit.
COMFORT AND FEEL: Flat, unyielding extra-firm feel with minimal contour and consistent lift across the full surface.
SIZE: This twin-sized mattress is a focused sleep surface well suited to solo sleepers, kids' rooms, and bunk-bed setups where a narrow profile is the priority.
BEST SLEEP MATCH: Stomach and back sleepers who need firm resistance to keep the hips from sinking. Extra firm support holds the pelvis level so the lower back stays decompressed through the night.
BEST FOR: Ideal for sleepers who need spinal alignment support, tend to sleep hot through the night, or have been told by a doctor to avoid soft surfaces.
CONSTRUCTION SPECIFICATIONS: The heavyweight cold-stretch knit cover pulls warmth away from the body immediately. Beneath it, a layer of gel-infused memory foam tempers heat without trapping it. Firm support H.D. foam and extra-firm H.D. support foam hold the body at the surface. A 720-coil, 13.5-gauge pocketed system provides the structural resistance that defines this mattress. A shock-absorbing H.D. base foam anchors everything below. Foams are CertiPUR-US certified.
SETUP AND COMPATIBILITY: Delivered flat with in-home professional setup included. Compatible with adjustable bases, platform frames, and box springs. No tools needed for setup.
NOT A FIT FOR: Sleepers who prefer any contouring or pressure relief at the shoulder. Not recommended for side sleepers who need hip and shoulder cushioning.
YOUR SLEEP, BACKED BY US
Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Rest Easy Promise, so you can come in, try before you buy, and take your time deciding. Add a premium mattress protector at purchase and you can upgrade that guarantee to a full 365 nights. We also back every purchase with our Best Price Guarantee, free next-day delivery, in-home professional setup, and flexible financing options to make it work for your budget.
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
Mancini's Sleepworld Onyx Extra Firm Mattress 13"
Features
- SKU: BRK-ONY-3M-XF-25
- MPN: 25WICRAFEF_FP33
- GTIN: 810146419044
- Brand: Mancini's
- Collection: Sleepworld
- Type: Innerspring
- Mattress In A Box: No
- Firmness: Extra Firm
- Height: 13
- Length: 75
- Width: 3
- Shipping Height: 13
- Shipping Width: 75
- Shipping Length: 38
- Warranty: 10 Year
- Cover Material: Polyester Knit
- Quilting Layers: 3/4 Extra Firm Quilt Poly,3/4 H.D Gel Infused M - Foam
- Comfort Layers: 1'' Firm Support H.D. Foam ,1.5'' Extra Firm H.D. Support Foam
- Support System: 720 13.5 Ga. Pocketed coil, 1.0'' Shock Absorbing H.D. Base Foam
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