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Extra Firm
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On Sale
Mancini's Sleepworld Granite Bay Extra Firm Mattress 13"-Split Cal King
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In Stock
Mancini's Sleepworld Granite Bay Extra Firm Mattress 13"
Why this Mattress?
- Built for back pain relief, even on the firmest surface possible
- Cold-touch stretch knit cover keeps heat from building up
- Graphite, copper, and titanium memory foam draws warmth away from the body
- Ultra high-density foam layers hold the spine in a neutral position all night
- Super high-density base foam resists softening and compression over time
Overview
Mancini's Sleepworld Granite Bay Extra Firm Mattress 13" | Split Cal King
The Mancini's Sleepworld Granite Bay Extra Firm Mattress 13" is a foam mattress built for back and stomach sleepers who need an unyielding, flat sleep surface to keep the spine properly aligned through the night. Where most mattresses let heavier zones sink and shift, the Granite Bay holds steady. The 13" profile delivers the kind of depth that says it will outlast several years of regular use, not just the first few months. Come talk to a sleep specialist at any Mancini's Sleepworld location and they'll put this one next to every competitor so you can feel exactly what "extra firm" means before you commit.
COMFORT AND FEEL: Extra firm, flat, and fully supportive with almost no give at the surface.
SIZE: This split Cal King sized mattress is a smart solution for couples with different firmness preferences, giving each sleeper their own side in a long, narrow California King footprint.
BEST SLEEP MATCH: Back and stomach sleepers who want a firm mattress for back pain relief will feel the difference here. The flat surface keeps the hips from dropping and the lower back from rounding through the night.
BEST FOR: Ideal for sleepers who need strict spinal support, tend to sleep hot, or have chronic lower back tension that worsens on softer mattresses.
CONSTRUCTION SPECIFICATIONS: The Super Heavy Weight "Cold" stretch knit cover pulls warmth away from the skin the moment you lie down. Ultra High Density memory foam infused with graphite, copper, and titanium sits below, helping to move heat off the body. A Super High-Density foam core anchors the base, keeping the surface from compressing unevenly across years of use.
SETUP AND COMPATIBILITY: Compatible with adjustable bases, platform frames, and box springs. This split Cal King ships and sets up as two separate pieces for easy maneuvering; confirm adjustable base compatibility at purchase.
NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning to relieve pressure. Also not suited for sleepers who prefer any amount of surface give or contouring.
YOUR SLEEP, BACKED BY US
Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee as our baseline commitment. Add a premium mattress protector at time of purchase and you can extend that to a full 365 nights. Every purchase also includes our Best Price Guarantee, free next-day delivery, in-home professional setup, and flexible financing options. Want to feel this mattress first? Visit any Mancini's Sleepworld showroom and try it before you buy.
- 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-GRA-6SM-XF-25
- MPN: 25WI13ALPMS_FP36X84
- GTIN: 810191944232
- Brand: Mancini's
- Collection: Sleepworld
- Type: Foam
- Mattress In A Box: No
- Firmness: Extra Firm
- Height: 13
- Length: 80
- Width: 39
- Shipping Height: 13
- Shipping Width: 80
- Shipping Length: 38
- Warranty: 10 Year
- Cover Material: Polyethylene & Poly Blend
- Quilting Layers: Smooth Top
- Comfort Layers: 1'' 4 / 13 Titanium M-Foam,2'' 3.6 / 22 Firm H.D M-Foam
- Support System: 10.0 1.8 / 36 H.D Base Foam
Specification
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes