It’s not supportive enough for back or stomach sleepers and it traps more heat than expected.

Tack on poor edge support and the price feels a little high for what you get.

This all-foam mattress has three layers of foam and memory foam.

Casper Sleep Original, Twin…

This is why my rating is a 5 out 10 on the firmness scale.

The surface is soft, and you sink somewhat into the mattress as it contours around your body.

Also don’t expect much in terms of pressure point and joint relief.

Diagram showing layers inside Casper Original mattress

I was impressed by the Casper Original’s motion isolation capabilities.

Most of today’sbest memory foam mattressesdo a good job on this front, and the Casper didn’t disappoint.

The Casper Original could do a lot better job at edge support.

Reviewer lying on the Casper Original mattress

The Casper is best suited to side sleepers

It made for an uncomfortable sleep experience.

Casper Original mattress review: Design

The Casper Original has a simple design.

This is followed by a memory foam layer with three zones.

Reviewer lying on the Casper Original mattress

This mattress lacked support when lying on my back

Essentially, they work together to keep the spine aligned.

A perforated layer of foam is placed on top to assist with breathability.

Casper calls it a ‘premium foam’ as it is also meant to relieve pressure points.

Casper Original mattress with reviewer’s hand resting on it

In some ways, this surprised me.

Both performed better in their reviews, too.

This was a bit of a disappointment considering the price and the brand name.

Casper Original mattress with weight and wine glass resting on it

I wouldn’t call the Casper Original supportive, especially not in the hip and back area.

Because of that, I had to sleep on my side rather than my back or stomach.

They found it soft and cozy and described it as a medium feel that offered nice contouring.

Reviewer sitting on the Casper Original mattress

She felt most comfortable on her side and back.

Factor in body weight too: the heavier you are, the firmer your mattress needs to be.

We double-check to test every mattress' edge support, motion isolation capabilities, and heat retention.

Casper Original mattress in its box

(Image credit: Future)

Read on to see how the Casper Original mattress performed in these areas.

If you struggle with sleeping hot, it’s worth considering investing in one of thebest cooling mattresses.

Motion isolation

Motion isolation is incredibly important for those with bedmates.

Casper Original mattress in its plastic wrapping

(Image credit: Future)

Who wants to wake up in the middle of the night when their partner is moving in their sleep?

No matter the distance the wine glass never fell over.

It shook but stood strong.

Casper Original mattress in its plastic wrapping on the bed frame

(Image credit: Future)

I considered all of this in my testing of the Casper Original’s edge support.

The results were not positive.

It sank one inch along the sides and 1.5 inches at the foot of the bed.

Casper Original mattress in its plastic wrapping on a bed frame

(Image credit: Future)

However, because the mattress is on the softer side, it feels unsupportive.

Shipping is free though it doesn’t look like a white glove delivery upgrade option is available.

I found it easy to move the box from my front porch to my room.

Casper Original mattress in its plastic wrapping on a bed frame

(Image credit: Future)

Upon removing the packaging, there weren’t any off-gassing smells.

It took a few hours for the mattress to fully expand inside the cover.

I slept on it that evening.

Casper Original mattress set up in the reviewer’s bedroom

A typical 10-year-limited warranty that covers defects and workmanship accompanies the Casper Original.

Essentially, the mattress would need a greater than one-inch indentation to be considered under the warranty.

There are some reviews for the Hybrid, Wave Hybrid Snow, and Nova Hybrid mixed in too.

Many pointed out that it’s soft but not ‘too soft’ or ‘too firm’.

One described it aptly as a marshmallow feel.

Should you buy the Casper Original mattress?

The plush feel will also suit lightweight people who need a mattress with a bit more sink.

The company has a good reputation.

You prefer a medium to medium-soft mattress:Can’t stand a firm mattress?

You won’t experience that with the Casper Original.

You want maximum value for money:We’ve tested more affordable mattresses that provide a better sleep experience.

For the price, we expect a little more in terms of comfort, design, and temperature regulation.

In fact, according to some reviewers, it may cause back pain.

A general rule is to look for a firmer mattress for example, theSiena memory foam mattress.

Head to TechRadar’s guide to thebest mattresses for back painfor more recommendations and information.

Evening temperatures varied during this time from nearly freezing in the high 30s to warm in the high 60s.

The bed was made with microfiber sheets and a lightweight comforter.

A friend also slept on the mattress one night.

Read more about how we test