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Firm
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On Sale
Casper One Firm Mattress 11"-Twin
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In Stock
Why this Mattress?
- Firm back support keeps your spine lifted all night
- Breathe Flex Foam™ adds bounce without trapping heat
- Align Memory Foam cradles hips and lower back deeply
- Dense Casper Core base resists softening over time
- All-foam build arrives compressed, ready in hours
Overview
Casper One Firm Mattress 11" Twin
The Casper One Firm Mattress 11" is a firm, all-foam mattress built for back and stomach sleepers who want real spinal support without sacrificing comfort. It is Casper's signature three-layer foam construction, reimagined and refined over a decade of sleeper feedback. Every layer is engineered to breathe, so you stay comfortable through the night rather than waking up overheated and restless. If you want to feel the difference between this and every competing option in the same price range, stop by any Mancini's Sleepworld location and one of our sleep specialists will walk you through it side by side.
COMFORT AND FEEL: Firm feel with responsive foam and steady lumbar support that holds through the night.
SIZE: This twin sized mattress is a natural fit for solo sleepers, growing kids, and single adults in smaller bedrooms.
BEST SLEEP MATCH: Built for back and stomach sleepers who need a firm mattress for back pain relief. The surface pushes back with just enough give to keep hips and lower back aligned without letting them sink.
BEST FOR: Ideal for sleepers who need firm lumbar support, wake up with lower back tension, or tend to sleep hot through the night.
CONSTRUCTION SPECIFICATIONS: The top Breathe Flex Foam™ layer responds quickly when you shift positions and allows airflow to move through while you sleep. Align Memory Foam in the middle layer cradles pressure points along the hips and lower back. The Casper Core base is dense enough to keep this mattress from softening out after the first year.
SETUP AND COMPATIBILITY: Works with adjustable bases, platform frames, and slatted foundations. Arrives rolled and compressed, expands within hours, no tools needed.
NOT A FIT FOR: Side sleepers who need deep shoulder cushioning may find this firmness too unyielding. Not recommended for sleepers who strongly prefer a plush or pillow-top feel.
YOUR SLEEP, BACKED BY US
At Mancini's Sleepworld, every mattress purchase comes with the Rest Easy Promise. That includes our Best Price Guarantee, free next-day delivery with professional in-home setup, and flexible financing options. Your purchase is backed by a 120-night comfort guarantee from day one. Add a premium mattress protector at checkout and you can upgrade that to a full 365 nights. Come try this mattress in person at any of our locations before you decide.
- 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: CAS-ONE-3M-FM-24
- MPN: 950-000151-001
- GTIN: 192472031344
- Brand: Casper
- Collection: One
- Type: Memory Foam
- Mattress In A Box: Yes
- Firmness: Firm
- Height: 11
- Length: 75
- 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: Polyurethane Foam
- Comfort Layers: Polyurethane Foam
- Support System: Memory Foam
Specification
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes
Related Products
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On Sale
- Delivery by Jul 25
