🇺🇸 United States · Memory Foam vs Memory Foam

Siena Memory FoamvsCocoon by Sealy Chill

Which one is best for you? Siena Memory Foam vs Cocoon by Sealy Chill - 2026 comparison by Vs Mattress

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Siena Memory Foam$300 OffCocoon by Sealy ChillSave 35% + Free Pillows & Sheets

Siena Memory Foam

by Siena · Memory Foam

$300 Off

10 years · 180-night trial

Cocoon by Sealy Chill

by Sealy · Memory Foam

Save 35% + Free Pillows & Sheets

10 years · 100-night trial

Pricing by size

Siena Memory Foam

Twin$499

Twin XL$599

Full (Double)$649

Queen$699

King$799

California King$799

Cocoon by Sealy Chill

Twin$619

Twin XL$709

Full (Double)$819

Queen$1,079

King$1,389

California King$1,389

Essential information

	Siena Memory Foam	Cocoon by Sealy Chill
Type	Memory Foam	Memory Foam
Launched	–	–
Brand	Siena	Sealy
Made in	–	United States
Unique points	The Siena memory foam mattress has five layers of pure comfort: Soft and Comfy Cover Responsive Memory Foam Body Supporting Layer Foundational Foam Shift-Resistant Lower Cover	3 layer construction: Perfect Fit Memory Foam Personalized Comfort Layer Support Foam.
Video	–	–

Certifications & trial

	Siena Memory Foam	Cocoon by Sealy Chill
OEKO-TEX®	No	No
CertiPUR-US®	Yes	Yes
Certifications	CertiPur-US®	CertiPur-US®
Other certification info	–	–
Sleep trial	180 nights	100 nights
Warranty	10 years	10 years
Free shipping	–	–
Free returns	Yes	Yes
Pay later	Yes	Yes
Delivery info	FREE SHIPPING, Within 2 - 5 Business Days With No Contact Delivery	When you order your Cocoon by Sealy mattress, well ship it to you (by UPS Ground) for free. Typically, your Cocoon by Sealy will arrive in 5 to 7 days.

Firmness & feel

	Siena Memory Foam	Cocoon by Sealy Chill
One firmness fits all	No	Yes
Select your firmness	No	No
Adjustable firmness	No	No
Half and half firmness	No	No
Flippable / reversible	No	No
Firmness info	–	The Cocoon Chill is a medium firmness, about a 6 on the firmness scale. We've found that most sleepers prefer a mattress that's fully supportive but not too firm, so we created a mattress with our Perfect Fit memory foam that adapts to your unique body size, shape and sleep position.

Construction & materials

	Siena Memory Foam	Cocoon by Sealy Chill
Layers	Responsive Memory Foam, Body Supporting Layer, Foundational Foam	Perfect Fit Memory Foam, Personalized Comfort Layer, Support Foam.
Cover	Soft and Comfy Cover: Soft to touch and breathable to keep you cool and comfortable.	Our premium stretch-knit cover is infused with a proprietary "Phase Change Material" that absorbs and dissipates heat for a refreshing, cool to the touch surface.
Machine-washable cover	No	No
Ergonomic handles	No	No
Comfort	Siena means comfort. Comfort that helps you forget about the worries of the day. Comfort that tells your body, “relax, it’s time to recharge”. Comfort that helps you enjoy a long, deep, and soul nourishing sleep.	A top layer of memory foam helps reduce the amount of movement from your sleep partner. The Soft model reduces a bit more motion transfer than the Firm model. Phase Change Material (PCM) absorbs your body heat leaving you with a cool to the touch mattress experience.
Support	Some people love super soft mattresses. Some people love a rock hard one. Most people are somewhere in the middle. That’s why the Siena is a medium firm mattress, comfortable to sleep on, but also firm enough to correctly support your body.	Our high-quality memory foam adapts to your body size, shape and sleep position to ensure a great sleep no matter which feel is right for you. Support Foam base layer engineered to be highly durable and resilient. We've tested it, and we know it bounces back every time.
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Size & weight

	Siena Memory Foam	Cocoon by Sealy Chill
Available sizes	Twin, Twin XL, Full (Double), Queen, King, California King	Twin, Twin XL, Full (Double), Queen, King, California King
Dimensions	Twin: 10 "	Twin: 10 "
Twin weight (kg)	42	40
Twin XL weight (kg)	45	42
Full (Double) weight (kg)	59	56
Queen weight (kg)	68	64
King weight (kg)	85	83
California King weight (kg)	85	83

FAQs

Siena Memory Foam

What are Siena mattresses made of?

The Siena Memory Foam Mattress is made with a tri-layer design that includes gel-infused memory foam and two different types of polyfoam. The foam used in the mattress is CertiPUR-US certified, meaning it's free from harmful chemicals and additives.

Can you flip the Siena mattress?

The Siena mattress is not designed to be flipped. It has a high-density base foam layer at the bottom, and flipping it would compromise its pressure-relieving properties.

How long will the Siena mattress last?

The Siena mattress, being a budget mattress, is not made with as many high-quality materials and is therefore expected to last about five years. This is approximately half the lifespan of a typical mattress.

Cocoon by Sealy Chill

Can you flip the Cocoon Chill mattress?

No, the Cocoon Chill mattress is not designed to be flipped. It is constructed with support layers at the bottom and comfort layers at the top. Flipping the mattress would disrupt the intended firmness and feel.

Is the Cocoon Chill mattress good for side sleepers?

The Cocoon Chill mattress may feel too firm for most side sleepers, but it is an excellent choice for back and stomach sleepers.

Do Cocoon by Sealy mattresses contain latex?

No, Cocoon™ by Sealy mattresses do not contain latex.

Wrap up

Thank you for checking out this Siena Memory Foam vs Cocoon by Sealy Chill mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.

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