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\n\n\n", "length": "80", "depth": "60", "sizeSelect": "Size: 60″ x 80″" } ], "resetUrl": "https://www.sleepworld.com/on/demandware.store/Sites-Sleepworld-Site/en_US/Product-Variation?dwvar_BRK-GRA-5M-XF-25-config_size=&pid=BRK-GRA-5M-XF-25-config&quantity=1" } ], "longDescription": "

Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" Twin

⭐⭐⭐⭐⭐ 4.8 · 10+ verified sleepers

The Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" is a foam mattress built for the sleeper who needs a firm mattress for back pain relief and wakes up feeling unsupported on anything that gives. It starts with a Super Heavy Weight \"Cold\" stretch knit quilt panel that regulates surface temperature without adding plushness. Underneath, Ultra High Density \"Firm\" Memory Foam layers infused with Graphite, Copper, and Titanium work together to pull warmth away from the body while conforming just enough to take the edge off pressure points. The dense base foam underneath resists softening over time so this mattress performs in year three the same way it does on night one. Stop by any Mancini's Sleepworld location and a sleep specialist will walk you through exactly how this one feels against every competing option on the floor.

COMFORT AND FEEL: Extra firm feel with minimal sink and strong lumbar resistance throughout the night.

SIZE: This Twin sized mattress is 39 inches by 75 inches, a focused sleep surface ideal for a single sleeper, a child's room, or a spare bedroom.

BEST SLEEP MATCH: Stomach and back sleepers will feel right at home here. The extra firm feel keeps the hips from dropping and the lower back from bowing, which is exactly what those positions need.

BEST FOR: Ideal for sleepers who need consistent spinal support, run warm at night, or have been waking up with lower back stiffness.

CONSTRUCTION SPECIFICATIONS: The stretch knit \"Cold\" quilt panel regulates surface temperature without adding softness. Ultra High Density Firm Memory Foam infused with Graphite, Copper, and Titanium pulls heat away and gently cushions pressure points. The Super High Density foam base resists body impressions and keeps the support structure solid for the long term.

SETUP AND COMPATIBILITY: Works with a platform frame, box spring, or adjustable base. Delivered flat with professional in-home setup available through Mancini's Sleepworld.

NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning, or anyone who prefers a mattress with meaningful contouring or softness.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee, free next-day delivery, in-home professional setup, and our Best Price Guarantee. Come try this mattress before you buy it in any of our showrooms. If you add a premium mattress protector at the time of purchase, you can upgrade your guarantee to a full 365 nights. Flexible financing is also available. That is the Rest Easy Promise.

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\n \n \n \n\n \n \n\n \n \n \n \n \n Price reduced from\n \n MSRP \n $1,039.99\n\n\n \n to\n \n \n \n \n \n \n \n \n Save 23%\n \n \n\n \n\n \n \n \n \n \n \n \n $799.99\n\n\n \n \n \n\n\n\n
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\n \n \n \n\n \n \n\n \n \n \n \n \n Price reduced from\n \n MSRP \n $1,039.99\n\n\n \n to\n \n \n \n \n \n \n \n \n Save 23%\n \n \n\n \n\n \n \n \n \n \n \n \n $799.99\n\n\n \n \n \n\n\n\n
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\n \n \n \n\n \n \n\n \n \n \n \n \n Price reduced from\n \n MSRP \n $1,429.99\n\n\n \n to\n \n \n \n \n \n \n \n \n Save 23%\n \n \n\n \n\n \n \n \n \n \n \n \n $1,099.99\n\n\n \n \n \n\n\n\n
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Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" · Queen

★★★★★ 4.8 · 10+ verified sleepers

The Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" is a foam mattress built for the sleeper who needs maximum spinal support without any give-and-sink feeling. If you wake up with lower back tension or simply know that a plush mattress leaves you stiff by morning, this is the structure your body has been asking for. An extra firm mattress for back pain relief like this one keeps the lumbar lifted and the hips from dropping, so your spine stays in a neutral position through the night. Our sleep specialists at Mancini's Sleepworld love helping customers feel this one side-by-side with softer options, because the difference is immediately obvious.

COMFORT AND FEEL: Extra firm with a flat, grounded feel and unyielding lumbar support throughout the night.

SIZE: This queen sized mattress is a spacious 60 by 80 inches, well suited for a single sleeper who sprawls or a couple who both prefer a firm, non-compressing sleep surface.

BEST SLEEP MATCH: Stomach and back sleepers will feel most at home here. The extra firm feel keeps hips from sinking, so the spine stays long and lower back tension stays quiet through the night.

BEST FOR: Ideal for sleepers who need firm back support, run warm through the night, or have tried plush mattresses and woken up sore.

CONSTRUCTION SPECIFICATIONS: The quilt panel uses a Super Heavy Weight \"Cold\" stretch knit fabric that actively pulls heat away from the surface. Beneath it, Ultra High Density memory foam infused with graphite, copper, and titanium works to disperse heat while gently contouring to pressure points. A Super High-Density foam core underneath keeps the structure stable and resistant to premature wear.

SETUP AND COMPATIBILITY: Compatible with an adjustable base, platform frame, or box spring. Delivered flat with professional in-home setup included, no tools required on your end.

NOT A FIT FOR: Not recommended for side sleepers who need hip and shoulder cushioning, or anyone who prefers a mattress with noticeable contouring and surface softness.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Best Price Guarantee. Add a premium mattress protector at purchase and you can extend that to a full 365 nights. We also offer free next-day delivery, in-home professional setup, and flexible financing. Better yet, come feel this mattress in person at any Mancini's Sleepworld location before you decide.

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Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" Twin

⭐⭐⭐⭐⭐ 4.8 · 10+ verified sleepers

The Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" is a foam mattress built for the sleeper who needs a firm mattress for back pain relief and wakes up feeling unsupported on anything that gives. It starts with a Super Heavy Weight \"Cold\" stretch knit quilt panel that regulates surface temperature without adding plushness. Underneath, Ultra High Density \"Firm\" Memory Foam layers infused with Graphite, Copper, and Titanium work together to pull warmth away from the body while conforming just enough to take the edge off pressure points. The dense base foam underneath resists softening over time so this mattress performs in year three the same way it does on night one. Stop by any Mancini's Sleepworld location and a sleep specialist will walk you through exactly how this one feels against every competing option on the floor.

COMFORT AND FEEL: Extra firm feel with minimal sink and strong lumbar resistance throughout the night.

SIZE: This Twin sized mattress is 39 inches by 75 inches, a focused sleep surface ideal for a single sleeper, a child's room, or a spare bedroom.

BEST SLEEP MATCH: Stomach and back sleepers will feel right at home here. The extra firm feel keeps the hips from dropping and the lower back from bowing, which is exactly what those positions need.

BEST FOR: Ideal for sleepers who need consistent spinal support, run warm at night, or have been waking up with lower back stiffness.

CONSTRUCTION SPECIFICATIONS: The stretch knit \"Cold\" quilt panel regulates surface temperature without adding softness. Ultra High Density Firm Memory Foam infused with Graphite, Copper, and Titanium pulls heat away and gently cushions pressure points. The Super High Density foam base resists body impressions and keeps the support structure solid for the long term.

SETUP AND COMPATIBILITY: Works with a platform frame, box spring, or adjustable base. Delivered flat with professional in-home setup available through Mancini's Sleepworld.

NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning, or anyone who prefers a mattress with meaningful contouring or softness.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee, free next-day delivery, in-home professional setup, and our Best Price Guarantee. Come try this mattress before you buy it in any of our showrooms. If you add a premium mattress protector at the time of purchase, you can upgrade your guarantee to a full 365 nights. Flexible financing is also available. That is the Rest Easy Promise.

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Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" Twin

⭐⭐⭐⭐⭐ 4.8 · 10+ verified sleepers

The Mancini's Sleepworld Granite Bay Extra Firm Mattress 13\" is a foam mattress built for the sleeper who needs a firm mattress for back pain relief and wakes up feeling unsupported on anything that gives. It starts with a Super Heavy Weight \"Cold\" stretch knit quilt panel that regulates surface temperature without adding plushness. Underneath, Ultra High Density \"Firm\" Memory Foam layers infused with Graphite, Copper, and Titanium work together to pull warmth away from the body while conforming just enough to take the edge off pressure points. The dense base foam underneath resists softening over time so this mattress performs in year three the same way it does on night one. Stop by any Mancini's Sleepworld location and a sleep specialist will walk you through exactly how this one feels against every competing option on the floor.

COMFORT AND FEEL: Extra firm feel with minimal sink and strong lumbar resistance throughout the night.

SIZE: This Twin sized mattress is 39 inches by 75 inches, a focused sleep surface ideal for a single sleeper, a child's room, or a spare bedroom.

BEST SLEEP MATCH: Stomach and back sleepers will feel right at home here. The extra firm feel keeps the hips from dropping and the lower back from bowing, which is exactly what those positions need.

BEST FOR: Ideal for sleepers who need consistent spinal support, run warm at night, or have been waking up with lower back stiffness.

CONSTRUCTION SPECIFICATIONS: The stretch knit \"Cold\" quilt panel regulates surface temperature without adding softness. Ultra High Density Firm Memory Foam infused with Graphite, Copper, and Titanium pulls heat away and gently cushions pressure points. The Super High Density foam base resists body impressions and keeps the support structure solid for the long term.

SETUP AND COMPATIBILITY: Works with a platform frame, box spring, or adjustable base. Delivered flat with professional in-home setup available through Mancini's Sleepworld.

NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning, or anyone who prefers a mattress with meaningful contouring or softness.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee, free next-day delivery, in-home professional setup, and our Best Price Guarantee. Come try this mattress before you buy it in any of our showrooms. If you add a premium mattress protector at the time of purchase, you can upgrade your guarantee to a full 365 nights. Flexible financing is also available. That is the Rest Easy Promise.

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Mancini's Sleepworld Granite Bay Extra Firm Mattress 13"

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