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Firm
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On Sale
Mancini's Sleepworld Granite Bay Firm Mattress 13"-Twin XL
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In Stock
Mancini's Sleepworld Granite Bay Firm Mattress 13"
Why this Mattress?
- Built for back sleepers who need real lumbar support without sinking in
- Graphite, copper, and titanium memory foam layers draw heat away as you sleep
- Firm feel keeps the spine lifted through the night
- Heavy-weight cold-stretch knit cover sleeps noticeably cooler from the first night
- Dense foam core holds its shape year after year
Overview
Mancini's Sleepworld Granite Bay Firm Mattress 13" · Twin XL
The Mancini's Sleepworld Granite Bay Firm Mattress 13" is a foam mattress built for back sleepers who need a firm mattress for back pain relief without sacrificing the feel of quality materials underfoot. Where cheaper foam beds go soft in the middle and stop supporting the lumbar within the first year, this one is engineered from the ground up to hold firm. The foam layers are infused with graphite, copper, and titanium to pull heat away from the body while the structured core keeps your hips and lower back from sinking out of alignment. If you want to feel this next to everything else in its class, stop by any Mancini's Sleepworld location and our sleep specialists will put it side by side with competing options so you can feel the difference yourself.
COMFORT AND FEEL: Firm foam feel with structured push-back support and minimal contouring.
SIZE: This Twin XL sized mattress is well suited to taller single sleepers, teens, and dorm or adjustable base setups.
BEST SLEEP MATCH: Best for back sleepers, and a solid choice for firm mattress for back sleepers who need the lumbar held level all night without a coil system underneath them.
BEST FOR: Ideal for sleepers who run warm, need consistent lumbar support, or have woken up stiff on a mattress that lost its shape too soon.
CONSTRUCTION SPECIFICATIONS: The cold-stretch knit cover releases heat on contact so the surface never traps warmth. Graphite, copper, and titanium infused memory foam layers absorb and disperse body heat across the comfort zone. The ultra-high-density firm foam layer resists compression and keeps the spine tracking straight. A super-high-density base foam anchors everything, so the mattress holds its shape well into year five and beyond.
SETUP AND COMPATIBILITY: Compatible with adjustable bases, platform frames, and standard box springs. Delivered flat with professional in-home setup included, no tools required.
NOT A FIT FOR: Dedicated side sleepers who need hip and shoulder cushioning may find this feel too unyielding. Combination sleepers who shift frequently may prefer a medium.
YOUR SLEEP, BACKED BY US
Every mattress purchase at Mancini's Sleepworld is backed by a 120-night comfort guarantee and the Rest Easy Promise, plus our Best Price Guarantee and free next-day delivery with in-home professional setup. Add a premium mattress protector at the time of purchase and you can choose to extend that guarantee to a full 365 nights. Flexible financing is available, and you are always welcome to try before you buy in any Mancini's Sleepworld showroom.
- SleepMatch: blue
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-3XM-FM-25
- MPN: 25WI13ALPMF_FP33XL
- GTIN: 810191940845
- Brand: Mancini's
- Collection: Sleepworld
- Type: Foam
- Mattress In A Box: No
- Firmness: Firm
- Height: 13
- Length: 80
- Width: 38
- Shipping Height: 13
- Shipping Width: 80
- Shipping Length: 38
- Warranty: 10 Year
- Cover Material: Polyethylene & Poly Blend
- Quilting Layers: Smooth Top
- Comfort Layers: 1'' 4.0 / 13 Titanium M-Foam,2'' 3/10 titanium M -Foam
- Support System: 2.0 1.8 / 18 transition over 8.0 1.8 / 36 H.D Base Foam
Specification
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes