• Firm
  • On Sale
  • Suitable For Adjustable Base
  • Motion Separation

Overview

Casper Slate Firm Mattress 10.5" Twin XL

The Casper Slate Firm Mattress 10.5" is a firm mattress for back pain relief built for sleepers who want clean, confident support without sinking into their bed. It's Casper's entry-level all-foam design, and it earns its place on a practical promise: three layers of foam working together to hold your spine level from the moment you lie down. The Breathe Flex Foam comfort layer responds quickly to pressure instead of trapping you in place, and the Casper Core base keeps the whole structure honest over time. If you've been waking up stiff and suspect your current mattress is the reason, a Mancini's Sleepworld sleep specialist can lay this one next to everything else you're considering so you can feel the difference for yourself.

COMFORT AND FEEL: Firm with a responsive, quick-recover surface that keeps hips and lumbar lifted.

SIZE: This Twin XL sized mattress is ideal for taller solo sleepers, college dorm rooms, or adjustable base setups where a single sleeper wants full-length coverage.

BEST SLEEP MATCH: Best for back and stomach sleepers. The firm feel keeps hips from dropping and holds the spine in a neutral line, which is exactly what these positions need to stop morning stiffness.

BEST FOR: Ideal for sleepers who need firm lumbar hold, tend to sleep warm on all-foam beds, or want a dependable no-frills mattress that won't soften out quickly.

CONSTRUCTION SPECIFICATIONS: The Breathe Flex Foam top layer is an open-cell foam that moves air as you move, so heat doesn't build under your body. It responds quickly, so you're never stuck. The Casper Core base foam anchors everything and resists the gradual compression that makes budget mattresses feel like a different bed after two years. The stretch knit cover gives way evenly under pressure rather than pulling tight in one spot. Foams are CertiPUR-US certified.

SETUP AND COMPATIBILITY: Arrives rolled and compressed in a box, expands within hours, no tools needed. Compatible with adjustable bases, platform frames, and slatted foundations. Box spring compatible.

NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning will likely find this too firm. Heavier sleepers who require deep compression support may want to consider a firmer hybrid option.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Rest Easy Promise, which includes a Best Price Guarantee, free next-day delivery with professional in-home setup, and flexible financing. Add a premium mattress protector at time of purchase and you can extend that guarantee to a full 365 nights. Want to try it first? Visit any Mancini's Sleepworld location and our sleep specialists will put this mattress right next to the competition.

  • 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

Casper Slate Firm Mattress 10.5"

Price reduced from MSRP  $839.00 to Save 29% $595.00
Total $595.00
Item No. CAS-SLA-3XM-FM-24
  • Built for the back sleeper who needs real lumbar hold without paying for features they don't need
  • Firm mattress for back pain relief in a lean, no-fuss all-foam design
  • Breathe Flex Foam top layer keeps air moving all night
  • Stretch knit cover adds give right where your body presses in
  • Casper Core base holds its shape year after year
Availability:
  • In Stock
Total $595.00

Calculate financing options
Please wait calculating financing options...
Delivery by May 17
See terms and conditions for details

Overview

Casper Slate Firm Mattress 10.5" Twin XL

The Casper Slate Firm Mattress 10.5" is a firm mattress for back pain relief built for sleepers who want clean, confident support without sinking into their bed. It's Casper's entry-level all-foam design, and it earns its place on a practical promise: three layers of foam working together to hold your spine level from the moment you lie down. The Breathe Flex Foam comfort layer responds quickly to pressure instead of trapping you in place, and the Casper Core base keeps the whole structure honest over time. If you've been waking up stiff and suspect your current mattress is the reason, a Mancini's Sleepworld sleep specialist can lay this one next to everything else you're considering so you can feel the difference for yourself.

COMFORT AND FEEL: Firm with a responsive, quick-recover surface that keeps hips and lumbar lifted.

SIZE: This Twin XL sized mattress is ideal for taller solo sleepers, college dorm rooms, or adjustable base setups where a single sleeper wants full-length coverage.

BEST SLEEP MATCH: Best for back and stomach sleepers. The firm feel keeps hips from dropping and holds the spine in a neutral line, which is exactly what these positions need to stop morning stiffness.

BEST FOR: Ideal for sleepers who need firm lumbar hold, tend to sleep warm on all-foam beds, or want a dependable no-frills mattress that won't soften out quickly.

CONSTRUCTION SPECIFICATIONS: The Breathe Flex Foam top layer is an open-cell foam that moves air as you move, so heat doesn't build under your body. It responds quickly, so you're never stuck. The Casper Core base foam anchors everything and resists the gradual compression that makes budget mattresses feel like a different bed after two years. The stretch knit cover gives way evenly under pressure rather than pulling tight in one spot. Foams are CertiPUR-US certified.

SETUP AND COMPATIBILITY: Arrives rolled and compressed in a box, expands within hours, no tools needed. Compatible with adjustable bases, platform frames, and slatted foundations. Box spring compatible.

NOT A FIT FOR: Side sleepers who need hip and shoulder cushioning will likely find this too firm. Heavier sleepers who require deep compression support may want to consider a firmer hybrid option.

YOUR SLEEP, BACKED BY US

Every mattress at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Rest Easy Promise, which includes a Best Price Guarantee, free next-day delivery with professional in-home setup, and flexible financing. Add a premium mattress protector at time of purchase and you can extend that guarantee to a full 365 nights. Want to try it first? Visit any Mancini's Sleepworld location and our sleep specialists will put this mattress right next to the competition.

Features

  • Suitable For Adjustable Base
  • Motion Separation
  • 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
Casper Slate  Firm Mattress 10.5" image number

Casper Slate Firm Mattress 10.5"

Price reduced from MSRP  $839.00 to Save 29% $595.00
Price reduced from MSRP  $839.00 to Save 29% $595.00
Twin XL

Features

  • SKU: CAS-SLA-3XM-FM-24
  • MPN: 950-000148-002
  • GTIN: 192472031238
  • Brand: Casper
  • Collection: Slate
  • Type: Memory Foam
  • Mattress In A Box: Yes
  • Firmness: Firm
  • Height: 10.5
  • Length: 80
  • Width: 38
  • Shipping Height: 42
  • Shipping Width: 15.5
  • Shipping Length: 15.5
  • Warranty: 10 Year Limited
  • Weight Capacity: 600
  • Cover Material: 98% Polyester, 2% Spandex
  • Quilting Layers: Convetional Foam
  • Comfort Layers: Latex Foam
  • Support System: Conventional Foam

Specification

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