-
Extra Firm
-
On Sale
Mancini's Sleepworld Onyx Extra Firm Mattress 13"-Full
-
In Stock
Mancini's Sleepworld Onyx Extra Firm Mattress 13"
Why this Mattress?
- Extra firm coil support keeps your spine properly aligned
- Gel-infused memory foam draws heat away while you sleep
- Super heavy-gauge wire coils resist sagging year after year
- Motion separation so a restless partner stays on their side
- CertiPUR-US certified foams, safe for your home
Overview
Mancini's Sleepworld Onyx Extra Firm Mattress 13" · Full
The Mancini's Sleepworld Onyx Extra Firm Mattress 13" is an innerspring mattress built for the back sleeper or stomach sleeper who needs a genuinely firm surface and wakes up stiff when their bed gives too much. If you've been sleeping on something that lets your hips sink and your lower back bow, this is the extra firm mattress for back pain relief you've been looking for. The Onyx Extra Firm is built around a fabric-wrapped coil system using super heavy-gauge wire that holds its shape and holds your spine, night after night. A stretch-knit cover with gel-infused memory foam quilting keeps the surface cool without softening the feel. Stop by any Mancini's Sleepworld location and our sleep specialists will lay this right next to every competing option so you can feel the difference yourself.
COMFORT AND FEEL: Extra firm with minimal give, delivering flat, stable support across the entire surface.
SIZE: This full sized mattress is a solid fit for a single adult who sleeps alone and wants every inch of the surface working for them.
BEST SLEEP MATCH: Back and stomach sleepers who need the firmest surface available will find this mattress keeps the lumbar lifted and the hips from dropping out of alignment.
BEST FOR: Ideal for sleepers who need strong spinal support, run warm at night, or have found that softer mattresses leave them waking up sore.
CONSTRUCTION SPECIFICATIONS: The heavyweight stretch-knit cover moves heat away from your body from the first hour. Gel-infused memory foam in the quilt layer adds a touch of temperature regulation without softening the feel underfoot. Firm and extra firm high-density support foam layers underneath resist compression so the mattress does not lose its shape. The fabric-wrapped, super heavy-gauge coil core keeps motion isolated and each layer is CertiPUR-US certified.
SETUP AND COMPATIBILITY: Delivered flat with in-home professional setup available. Compatible with adjustable bases, platform frames, and box springs. No tools needed for setup.
NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning, or anyone who prefers a plush or medium feel.
YOUR SLEEP, BACKED BY US
At Mancini's Sleepworld, every mattress comes with a 120-night comfort guarantee, our Best Price Guarantee, free next-day delivery, and flexible financing. Before you buy, come try this mattress in any of our stores. Add a premium mattress protector at the time of purchase and you can extend your guarantee to a full 365 nights, an entire year to be certain. That choice is yours to make.
- SleepMatch: red
Rest Easy Promise
Our promise to you.
- 365-Night Comfort Guarantee with purchase of a premium mattress protector
- Best Price Guarantee Find it lower and we’ll match it.
- Free Next-Day Delivery We’ll deliver to your door, set-up available.
- Double-Your-Warranty We match the manufacturer’s warranty.
Features
- SKU: BRK-ONY-4M-XF-25
- MPN: 25WICRAFEF_FP46
- GTIN: 810146419068
- Brand: Mancini's
- Collection: Sleepworld
- Type: Innerspring
- Mattress In A Box: No
- Firmness: Extra Firm
- Height: 13
- Length: 75
- Width: 54
- Shipping Height: 13
- Shipping Width: 75
- Shipping Length: 54
- 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
-
Suitable For Adjustable Base: Yes
-
Motion Separation: Yes
-
Cooling Technology: Yes
-
Edge Support: Yes