Is the Casper Cloud One good for side sleepers?

Yes. The medium-soft top and memory foam layer cushion shoulders and hips, which suits side sleepers. Stomach sleepers and heavier buyers often find it too soft.

Does the Cloud One sleep hot?

It uses open-cell breathable comfort foam, and most owners say it sleeps cooler than typical memory foam. A mattress protector and a cool room still help.

What sizes does it come in?

Twin, Twin XL, Full, Queen, King and California King. The Queen is 80 inches long and 38 inches wide.

Is it fiberglass-free?

Yes. Casper lists the Cloud One as fiberglass-free and assembled in the USA.

When is the best time to buy?

Prices move with sales. The lowest daily price since October 31 was $599 on November 6, against $779 at Casper that day, so watch for holiday and clearance drops.

Does it need a box spring?

No. The all-foam mattress works on a platform bed, slatted frame or adjustable base. A box spring is optional.

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Home · Sit 'n Sleep

Casper Cloud One Mattress

Name: Casper Cloud One Mattress
Brand: Casper
Availability: InStock

Deal score 4.9 · Good deal

$849.00$1,224.00 Sit 'n Sleep's regular price

You save $375.00 at Sit 'n Sleep

Deal.ai's agents found this deal on November 8. The store may have changed its price since.

Why it's a great deal

Elsewhere right now: Casper $849.00
Sit 'n Sleep lists its regular price at $1,224.00: 31% off by its own figures
Rated 4.3 out of 5 by 183 buyers

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Every store we checked

Sleep OutfittersNew
In stock
$779.00Observed at 1:14 PM
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Sleep OutfittersNew
In stock
$779.00Observed at 1:14 PM
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Sit 'n SleepNew
In stock
$849.00Observed at 5:07 PM
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CasperNew
In stock
$849.00Observed at 5:07 PM
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Big Sandy SuperstoreNew
In stock
$849.00Observed at 5:07 PM
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Mattress WarehouseNew
In stock
$919.00Observed at 12:37 AM
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thesleeploft.comNew
In stock
$1,124.00Observed at 1:14 PM
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Mattress World NorthwestNew
In stock
$1,124.00Observed at 1:14 PM
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Bailey's FurnitureNew
In stock
$1,581.96Observed Nov 7, 2026, 4:44 PM
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Best Buy FurnitureNew
In stock
$1,699.00Observed at 1:14 PM
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eBayPre-owned
Availability unknownSold by giltmodern (100% positive, 34 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$725.00Free shippingObserved at 1:14 PM
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eBayNew
Availability unknownSold by retail_king (99% positive, 78,200 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$751.18Free shippingObserved at 4:23 PM
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WG&R FurnitureNew
Availability unknown
$849.00Observed at 5:07 PM
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Rooms To GoNew
Availability unknown
$919.00Observed at 6:22 AM
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Gardner-White FurnitureNew
Availability unknown
$919.00Observed Nov 7, 2026, 8:18 AM
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PC Richard & SonNew
Availability unknown
$958.97Observed at 6:02 AM
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Appliance Factory & Mattress KingdomNew
Availability unknown
$959.00Observed at 5:07 PM
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The Better MattressNew
Availability unknown
$959.00Observed at 5:07 PM
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Mattress WarehouseNew
Availability unknown
$959.00Observed at 5:07 PM
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Ortho MattressNew
Availability unknown
$959.00Observed at 5:07 PM
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Mattress Overstock KentuckyNew
Availability unknown
$961.00Observed at 5:07 PM
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HOM FurnitureNew
Availability unknown
$974.00Observed Nov 6, 2026, 2:26 AM
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Bedding MartNew
Availability unknown
$1,324.00Observed Nov 5, 2026, 6:37 AM
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The Sleep CenterNew
Availability unknown
$1,329.00Observed at 5:07 PM
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ProFit MattressNew
Availability unknown
$1,329.99Observed at 5:07 PM
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Price history and every store's price →

From Mattress Overstock Kentucky

Medium-soft all-foam mattress, 11 inches tall
Patent-pending Casper Core+ foam pillars add plushness while keeping support
Open-cell breathable comfort foam built to prevent overheating
Cradling memory foam with pockets of relief for shoulders and hips
All-foam motion isolation keeps a partner's movement on their side
Fiberglass-free, designed and assembled in the USA

Sizes: Twin, Twin XL, Full, Queen, King, Cal King
Materials: Breathe Flex Foam + Align Memory Foam + Casper Core+ support core; fiberglass-free
Fit: Medium-soft; side sleepers are the headline fit, lighter-weight sleepers settle in without bottoming out; heavier sleepers or those who want a firm feel may pre
Guarantee: Casper 10-year limited warranty against manufacturing defects, honored as an authorized Casper dealer; 100-night trial at Mattress Overstock
Returns: No cash refunds: an exchange is for store credit toward a bed of equal or greater value, paying any difference
Shipping: Free local delivery, setup and old-mattress haul-away on qualifying purchases across the Kentucky service area; online shipping charges, if any, show at checkou

Specs

Size: Queen, Twin, King, Full, California King, Twin XL
Type: Innerspring
Thickness: 11 in
Length: 80 in long
Width: 38 in wide

About the Casper Cloud One Mattress

The Cloud One is Casper's medium-soft all-foam mattress, 11 inches tall, built on patent-pending Core+ foam pillars with breathable open-cell comfort foam and a cradling memory foam top. It is fiberglass-free and assembled in the USA, and its all-foam build keeps a partner's movement from crossing the bed. The best new price is $779 at Casper as of November 6, 2026, at the top of its recent range; the lowest daily price since October 31 was $599 on November 6, against a high of $779.99 on October 31.

Best forSide and combo sleepers who want a soft, cradling feelCouples who want motion isolationShoppers who want a fiberglass-free foam bedGuest rooms and lighter sleepers

Pros

Medium-soft feel with Core+ pillars for support under the plush top
Memory foam layer cushions shoulders and hips
All-foam design isolates a partner's movement
Open-cell foam is built to reduce heat buildup
Fiberglass-free and assembled in the USA
Ships as a bed-in-a-box and expands on setup

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