• Firm
  • On Sale

Why this Mattress?

  • Firm support keeps your spine in line all night
  • Gel-infused memory foam draws heat away from you
  • Cool-touch stretch knit cover stays comfortable by morning
  • Dense foam base resists softening over time
  • CertiPUR-US certified foams, safe for your home
Mancini's

Mancini's Sleepworld Marina Firm Mattress 8"-Twin XL

Item No. BRK-MAR-3XM-FM-25
Delivery by Jul 06 to 94550
Price reduced from MSRP  $649.99 to Save 38% $399.99

Twin 38″ x 75″
Price reduced from MSRP  $599.99 to Save 42% $349.99
Twin XL 38″ x 80″
Price reduced from MSRP  $649.99 to Save 38% $399.99
Full 54″ x 75″
Price reduced from MSRP  $729.99 to Save 38% $449.99
Cal King 72″ x 84″
Price reduced from MSRP  $1,049.99 to Save 33% $699.99
Eastern King 76″ x 80″
Price reduced from MSRP  $1,049.99 to Save 33% $699.99
Queen 60″ x 80″
Price reduced from MSRP  $779.99 to Save 36% $499.99
Availability:
  • In Stock
Total $399.99
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Mancini's Sleepworld Marina Firm Mattress 8"

Price reduced from MSRP  $649.99 to Save 38% $399.99
Price reduced from MSRP  $649.99 to Save 38% $399.99

Why this Mattress?

  • Firm support keeps your spine in line all night
  • Gel-infused memory foam draws heat away from you
  • Cool-touch stretch knit cover stays comfortable by morning
  • Dense foam base resists softening over time
  • CertiPUR-US certified foams, safe for your home

Overview

Mancini's Sleepworld Marina Firm Mattress 8" - Twin XL

The Mancini's Sleepworld Marina Firm Mattress 8" is a firm mattress built for back and stomach sleepers who need reliable spinal support without the bulk of a thicker build. If you've been waking up stiff or sinking too far into a softer mattress, this one holds its ground. A firm mattress for back pain relief, the Marina keeps the lumbar lifted so your body stays in neutral alignment through the night. At 8 inches, it's a focused, no-fuss build that does exactly what it promises. Stop by any Mancini's Sleepworld location and our sleep specialists will help you put this next to every competing option so you can feel the difference yourself.

COMFORT AND FEEL: Firm and supportive with a cool memory foam surface that hugs without cradling too deep.

SIZE: This Twin XL sized mattress is ideal for taller single sleepers, college dorm setups, and anyone who needs extra length without extra width.

BEST SLEEP MATCH: Best for back and stomach sleepers. The firm feel keeps hips from dropping, which is exactly what those positions need to stay in alignment through the night.

BEST FOR: Ideal for sleepers who need firm lumbar support, want a cooler sleep surface, or find themselves sinking too far into softer foam.

CONSTRUCTION SPECIFICATIONS: The stretch knit cover moves with you and stays cool from the first moment you lie down. A gel-infused memory foam comfort layer absorbs surface heat so it doesn't build up underneath you. A Titanium-infused super high-density memory foam layer adds a firm, responsive feel. The high-density support core underneath keeps this mattress from softening out after a year of use. Foams are CertiPUR-US certified.

SETUP AND COMPATIBILITY: Works with an adjustable base, platform frame, or traditional box spring. Delivered flat with in-home professional setup available.

NOT A FIT FOR: Dedicated side sleepers who need deep hip and shoulder cushioning, or anyone who prefers a plush or pillow-top feel.

YOUR SLEEP, BACKED BY US

Every mattress purchase at Mancini's Sleepworld includes a 120-night comfort guarantee and our Best Price Guarantee, so you know you're not overpaying. Add a premium mattress protector at the time of purchase and you can choose to extend that guarantee to a full 365 nights. We offer free next-day delivery, in-home professional setup, and flexible financing. Come try this mattress in person at any Mancini's Sleepworld showroom before you decide.

  • SleepMatch: red
A color code of red indicates that you need extra firm support. This is often true of some back sleepers and stomach sleepers. Find Your Match
Couple relaxing on a mattress

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-MAR-3XM-FM-25
  • MPN: 25WI08LDGF_FP33XL
  • GTIN: 810191940524
  • Brand: Mancini's
  • Collection: Sleepworld
  • Type: Memory Foam
  • Mattress In A Box: No
  • Firmness: Firm
  • Height: 8
  • Length: 80
  • Width: 38
  • Shipping Height: 8
  • Shipping Width: 80
  • Shipping Length: 38
  • Warranty: 10 Year
  • Cover Material: Polyethylene & Poly Blend
  • Quilting Layers: 0.75 1.8 /10 Gel Infused Memory Foam
  • Comfort Layers: 1'' 3/ 10 Titanium Memory Foam
  • Support System: 6.0 1.5 / 30 Base Foam

Specification

  • Suitable For Adjustable Base: Yes
  • Motion Separation: Yes
  • Edge Support: Yes