When you purchase through links on our site, we may earn an affiliate commission.Heres how it works.

Our time there included afactory tourand a hands-on session where we ‘built’ our own mattresses.

The 3 types of foam used in mattresses

1.

Mattress tester for Tom�s Guide in the 3z factory feeling a new mattress surface

(Thus, it’s often used as a comfort layer or in a pillow top.)

Compounds added to polyurethane during production by different manufacturers of memory foam will affect its viscosity and elasticity.

Thedensity of memory foamwill influence its performance.

A tester’s hand on a piece of memory foam at the 3Z Brands factory in Arizona

Denser foam is more durable, delivers deeper contouring, and isolates motion exceptionally well.

Higher-density memory foam is more likely to trap heat.

Polyfoam doesn’t hug the body as tightly as memory foam, nor does it isolate movement as well.

A hand tests the temperature control of the 32 Latex Topper

Polyfoam is either uniform with a smooth, even surface or convoluted with an ‘egg crate’ formation.

Due to its lower density, polyfoam is less likely to retain heat than memory foam.

Its also a more affordable material, commonly found inbudget mattresses.

A hybrid mattress being assembled on the factory line at 3Z Brands in Arizona, US

On the other hand, polyfoam isn’t as durable and supportive as memory foam or latex.

Latex foam

Latex foam comes in two types: synthetic and natural.

Natural latex is created using theTalalay or Dunlopmethod, which affects the feel of the material.

The layers of a mattress exposed during assembly at 3Z Brands factory in Arizona, US

Talalay latex is softer and more breathable, making it suitable for the upper layers of a mattress.

Synthetic latex can be firm or soft, but it’s not as buoyant or breathable as natural latex.

Blended latex foam, which combines synthetic and natural materials, offers a mix of these characteristics.

A hand pressing into white surface of Nectar Classic memory foam mattress

4 ways foam layers are used in a mattress

1.

This padding is usually memory foam or latex, but other materials like cotton and wool may be used.

Despite their differences, some sleep brands use both of these terms interchangeably.

A side by side comparison of a Nectar Memory Foam mattress and a Saatva hybrid pillow-top mattress

Memory foam is a popular material for comfort layers because its body-hugging sensation is great for pressure relief.

Its density also makes it effective at isolating motion, which is beneficial for bed-sharers.

To prevent heat retention, memory foam comfort layers are often infused with cooling agents.

A hand presses into the Nectar Classic Memory Foam Mattress to test the temperature regulation and pressure relief

Polyfoam is commonly used in the comfort layers of budget mattresses.

Natural latex is often used in the comfort layers of organic mattresses.

It’s more breathable than synthetic foams with a responsive, bouncy feel.

Memory foam vs latex mattresses: image shows the Nectar mattress on the left and the Saatva Latex Hybrid on the right

This is helpful for ease of movement but not so much for motion isolation.

Natural latex doesnt mold quite like memory foam, but it will gently cradle your body for pressure relief.

Transition layer

The transition layer is the unsung hero of mattresses.

Women sleeping on two white pillows

Dense polyfoam and latex foam work well as transition layers.

Due to its elasticity, memory foam isn’t really used here.

Foundation layer

The foundation layer keeps a mattress stable and promotes proper alignment.

Memory foam vs hybrid mattresses

Organic mattresses that dont have pocket coils may use Dunlop latex as a foundation.

Some hybrids have high-density polyfoam rails around the perimeter of the pocket coil layer for reinforced edge support.

Matttress foam FAQs

What is open cell foam?

A split image featuring the Nectar Classic Memory Foam Mattress on the left and the DreamCloud Luxury Hybrid on the right, leading into the DreamCloud Luxury Hybrid vs Nectar Classic showdown

Thus, it’s used for insulation, packing materials, and even yoga mats.

Are foam mattresses good for hot sleepers?

The general rule for hot sleepers is to avoid all-foam mattresses because of their propensity to trap heat.

The Tempur-Pedic Tempur-Adapt mattress on a bed frame in a bedroom, a man and his young sun sitting on top of it, smiling. A Tom�s Guide price drop deals graphic (right)

However, there are exceptions.

Thebest memory foam mattressesincorporate specialized materials to draw heat away from the surface.

Can a memory foam mattress cause back pain?

Bed bugs

If you want a memory foammattress for back pain, look for a medium-firm or firm level of comfort.

A mattress that’s too soft can create more problems than it solves.

The Saatva Murphy Bed Mattress on a Murphy bed frame lying flat, in a bedroom

The image shows the Casper Hybrid with Snow Technology pillow on the left and the Coop Cool+ pillow on the right in a side by side comparison

A child lying on their side covering their eyes in bed

A woman with an afro sleeping on her side covered in grey duvet while she sweats in her sleep, thinking of a cooling mattress.

A woman with brown hair lies on her stomach on a grey colour Japanese floor mattress

A mattress we tested is dressed with neutral colour bed linens and pillows

Casper Wave Hybrid Snow review: woman lying on the mattress on her side, with her head on a pillow

Woman smiling while she sleeps with headphones in and her arms overhead

A person wearing rubber gloves uses a spray bottle and a clean cloth to clean the surface of the Emma Elite mattress.

NYT Strands on a cellphone