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Firm
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On Sale
Overview
- SleepMatch: blue
Mancini's Sleepworld Onyx Firm Mattress 13"
- Firm mattress for back pain relief keeps spine aligned
- Gel-infused memory foam pulls heat away while you sleep
- 840 pocketed coils move independently to reduce motion transfer
- Dense upholstery-grade foam resists softening over time
- Heavyweight cold-stretch cover sleeps noticeably cooler
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In Stock
Overview
Mancini's Sleepworld Onyx Firm Mattress 13" Queen
⭐⭐⭐⭐ 3.5 · 10+ verified sleepers
The Mancini's Sleepworld Onyx Firm Mattress 13" is an innerspring mattress built for back and stomach sleepers who need consistent, structured support without any give that lets the hips sink. At 13 inches tall, it layers a gel memory foam quilt over a pocketed coil system and high-density foam base, giving you a mattress that holds its shape year after year. This is not a bed that coddles. It is one that keeps the lumbar lifted and the spine tracking the way it should. If you want to feel the Onyx Firm next to every competing option in its class, our sleep specialists at any Mancini's Sleepworld location are ready to walk you through it.
COMFORT AND FEEL: Firm feel with cool memory foam at the surface and structured coil support beneath.
SIZE: This queen sized mattress is a strong fit for solo back sleepers or couples who share a bed and both prefer a firmer, temperature-neutral sleep surface.
BEST SLEEP MATCH: Firm mattress for back sleepers and stomach sleepers who want the spine held level without contouring that lets the midsection drop overnight.
BEST FOR: Ideal for sleepers who need lower back support, run warm through the night, or share a bed and want to cut down on motion disturbance.
CONSTRUCTION SPECIFICATIONS: The heavyweight cold-stretch knit cover keeps the surface noticeably cooler than a standard polyester panel. Gel-infused memory foam in the quilt layer absorbs and disperses heat before it builds up. The 840 pocketed coil system moves independently so a restless partner does not pull you out of sleep. Dense upholstery-grade support foam at the base keeps this mattress from softening out after heavy use. Foams are CertiPUR-US certified.
SETUP AND COMPATIBILITY: Compatible with adjustable bases, platform frames, and box springs. Delivered flat with professional in-home setup included, no tools required on your end.
NOT A FIT FOR: Side sleepers who need shoulder and hip cushioning, or anyone who prefers a plush or pillow-top surface that allows deeper contouring.
YOUR SLEEP, BACKED BY US
At Mancini's Sleepworld, our mattress specialists are here every step of the way, and you can try this mattress before you buy it in any of our stores. Every purchase includes a 120-night comfort guarantee and our Best Price Guarantee, plus free next-day delivery and professional in-home setup. Add a premium mattress protector at checkout and you can upgrade your guarantee to a full 365 nights. Flexible financing is available. That is the Rest Easy Promise.
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: blue
Mancini's Sleepworld Onyx Firm Mattress 13"
Features
- SKU: BRK-ONY-5M-FM-25
- MPN: 25WICRAFF_FP50
- GTIN: 810146419181
- Brand: Mancini's
- Collection: Sleepworld
- Type: Innerspring
- Mattress In A Box: No
- Firmness: Firm
- Height: 13
- Length: 80
- Width: 60
- Shipping Height: 13
- Shipping Width: 80
- Shipping Length: 60
- Warranty: 10 Year
- Cover Material: Polyester Knit
- Quilting Layers: 3/4 H.D Gel Infused M - Foam, 3/4 Extra Firm Quilt Poly
- Comfort Layers: 1'' Med-Firm H.D. Foam,1.5'' Extra Firm H.D. Support Foam
- Support System: 8'' 840 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