🇺🇸 United States · Memory Foam vs Hybrid (coils and latex)

Siena Memory FoamvsBirch by Helix

Which one is best for you? Siena Memory Foam vs Birch by Helix - 2026 comparison by Vs Mattress

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Siena Memory Foam$300 OffBirch by Helix20% Off + 2 Free Gifts

Siena Memory Foam

by Siena · Memory Foam

$300 Off

10 years · 180-night trial

Birch by Helix

by Birch Living · Hybrid (coils and latex)

20% Off + 2 Free Gifts

25 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

Birch by Helix

Twin$1,498.80

Twin XL$1,623.80

Full (Double)$1,873.80

Queen$2,123.80

King$2,498.80

California King$2,498.80

Essential information

	Siena Memory Foam	Birch by Helix
Type	Memory Foam	Hybrid (coils and latex)
Launched	–	–
Brand	Siena	Birch Living
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	The Birch mattress was designed by Helix, the team behind the leading mattress brand in customized sleep. Birch takes those learnings in comfort and uses all natural and organic materials. The Birch mattress is a 6 layer construction: Cover - Organic Cotton Fire Retardant Cover - Wool Comfort Layer - Birch Wool Pressure Relief Layer - Natural Talalay Latex Support Layer - Individually Wrapped Coils Base Layer - Wool Batting.
Video	–	–

Certifications & trial

	Siena Memory Foam	Birch by Helix
OEKO-TEX®	No	No
CertiPUR-US®	Yes	No
Certifications	CertiPur-US®	Global Organic Textile Standard (GOTS), GREENGUARD Gold, Eco-INSTITUT, Forest Stewardship Council
Other certification info	–	<p id="">Global Organic Textile Standard (GOTS), GREENGUARD Gold, eco-INSTITUT, Forest Stewardship Council</p>
Sleep trial	180 nights	100 nights
Warranty	10 years	25 years
Free shipping	–	–
Free returns	Yes	Yes
Pay later	Yes	Yes
Delivery info	FREE SHIPPING, Within 2 - 5 Business Days With No Contact Delivery	Your Birch Mattress is gently compressed, rolled, and put in a box for easy shipping! We ship via FedEx Ground direct from the manufacturer to your door. Delivered for free typically in 4 to 8 business days.

Firmness & feel

	Siena Memory Foam	Birch by Helix
One firmness fits all	No	No
Select your firmness	No	No
Adjustable firmness	No	No
Half and half firmness	No	No
Flippable / reversible	No	No
Firmness info	–	–

Construction & materials

	Siena Memory Foam	Birch by Helix
Layers	Responsive Memory Foam, Body Supporting Layer, Foundational Foam	Organic Cotton, Fire Retardant Cover, Comfort Layer, Pressure Relief Layer, Support Layer, Base Layer
Cover	Soft and Comfy Cover: Soft to touch and breathable to keep you cool and comfortable.	The Birch Mattress has a cover that is made using natural, organic cotton. It is designed to be highly breathable with a subtle stretch and soft touch.
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.	Our materials come from nature - whether it be wool sustainably sheared from New Zealand sheep or latex tapped from trees. These premium materials are comfortable on your body and conscience. 100% all natural & organic Birch Wool provides unparalleled comfort and temperature regulation. Birch Wool is designed to retain shape with a natural elasticity of each fiber. Talalay latex is up to 7 times more breathable than other types of latex. Natural latex is also hypoallergenic and anti-microbial.
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.	We spent countless hours finding the right density of latex, quantity of wool, and type of steel springs to provide unprecedented comfort and pressure relief. Each mattress features a reinforced perimeter for best in class edge support. The coils that run along the outside of your mattress are actually firmer, so no more feeling of falling off the bed when lying down or sitting on the edge. Natural Talalay latex provides response to cushion your pressure points while giving support. Our latex is carefully managed to ensure consistency. Hundreds of individual steel coils help to cradle your body and provide support, while also limiting motion transfer. Additionally, the reinforced perimeter coils provide best in class edge support.
Posts	–	–

Size & weight

	Siena Memory Foam	Birch by Helix
Available sizes	Twin, Twin XL, Full (Double), Queen, King, California King	Twin, Twin XL, Full (Double), Queen, King, California King
Dimensions	Twin: 10 "	Twin: 11 "
Twin weight (kg)	42	N/A
Twin XL weight (kg)	45	N/A
Full (Double) weight (kg)	59	N/A
Queen weight (kg)	68	N/A
King weight (kg)	85	N/A
California King weight (kg)	85	N/A

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.

Birch by Helix

Is birch mattress good for couples?

Yes, Birch mattresses are ideal for couples as they have excellent cooling properties. The natural wool and latex layers allow for breathability and prevent the mattress from retaining body heat, making it a good choice for couples who tend to overheat.

Does the birch mattress smell?

The Birch Natural mattress does have a strong initial smell which may deter some customers. However, it offers pressure relief, motion isolation, and heat diffusion.

What materials are used in a Birch mattress?

Birch mattresses are made with natural materials including wool, latex, cotton, and steel. More details can be found on the Birch materials page.

Wrap up

Thank you for checking out this Siena Memory Foam vs Birch by Helix 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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