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Firm
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On Sale
Casper Slate Firm Mattress 10.5"-Eastern King
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In Stock
Casper Slate Firm Mattress 10.5"
Why this Mattress?
- Built for sleepers who need real, unwavering support night after night.
- Breathe Flex Foam top layer keeps air moving all night.
- Firm Casper Core base resists sinking and sagging over time.
- Stretch-knit cover delivers full surface feel from edge to edge.
- Three-layer foam construction holds its shape for years.
Overview
Casper Slate Firm Mattress 10.5" · Eastern King
The Casper Slate Firm Mattress 10.5" is a foam mattress built for back and stomach sleepers who want a firm, reliable foundation without a complicated price tag. It is Casper's firm all-foam entry point, designed around a straight-forward three-layer construction that puts support at the center of every night. The responsive Breathe Flex Foam comfort layer moves with you and keeps airflow circulating so the surface never traps heat. A firm mattress for back pain relief, the Slate keeps your hips and lower back lifted throughout the night instead of letting them settle into the mattress. Stop by any Mancini's Sleepworld location and our sleep specialists will put this next to every competing option in the store so you can feel exactly what firm means before you commit.
COMFORT AND FEEL: Firm feel with a responsive, slightly bouncy surface and a supportive, non-compressing base.
SIZE: This Eastern King sized mattress is a generous 76" x 80" surface well suited to couples or solo sleepers who want room to stretch out.
BEST SLEEP MATCH: Back and stomach sleepers who need a firm mattress for back sleepers will feel the most at home here. The firm, stable base keeps hips aligned and stops the lower back from rounding inward through the night.
BEST FOR: Ideal for sleepers who need firm lumbar support, run warm, or have been waking up stiff from a mattress that has lost its shape.
CONSTRUCTION SPECIFICATIONS: The Breathe Flex Foam comfort layer is both responsive and breathable, giving you a slight bounce without any heat buildup. The firm Casper Core base keeps the mattress from softening out under consistent pressure. A stretch-knit cover with four-way give lets the support layers do their job without any barrier between you and the foam.
SETUP AND COMPATIBILITY: The Slate arrives rolled and compressed in a box, expands within hours, and requires no tools. Compatible with adjustable bases, platform frames, and box springs.
NOT A FIT FOR: Side sleepers who need deep shoulder and hip cushioning. Not well suited to sleepers who prefer a soft or medium feel.
YOUR SLEEP, BACKED BY US
At Mancini's Sleepworld, every mattress purchase comes backed by the Rest Easy Promise, which includes a 120-night comfort guarantee, Best Price Guarantee, and free next-day delivery with professional in-home setup. Add a premium mattress protector at checkout and your comfort guarantee extends to a full 365 nights. Flexible financing options are available, and you are always welcome to try the Slate in person at any of our locations before you buy.
- SleepMatch: red
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-SLA-E6M-FM-24
- MPN: 950-000148-005
- GTIN: 192472031269
- Brand: Casper
- Collection: Slate
- Type: Memory Foam
- Mattress In A Box: Yes
- Firmness: Firm
- Height: 10.5
- Length: 80
- Width: 76
- Shipping Height: 42
- Shipping Width: 18.5
- Shipping Length: 18.5
- 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
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes
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