Tomorrow Sleep and Casper are two popular mattress companies that sell directly online. Casper made the big splash in the industry a few years ago, while Tomorrow Sleep is backed by the biggest manufacturer of mattresses in the country. I’ll go through the main similarities and differences between the two mattresses in this mattress comparison to help you make a more informed decision.
- Both come from well-established companies and ship in a box.
- Both have a layer of memory foam somewhere in the construction.
- Both are 10 inches thick and have comfort layers that total 3 inches in thickness.
- Both address the issue of sleeping hot well.
- Casper uses foam as a support layer, while Tomorrow Sleep uses pocketed coils.
- Tomorrow Sleep has two comfort level options, while Casper has just one.
- Casper has more bounce and a balanced foam feel, while Tomorrow Sleep has more of a quicksand, memory foam feel.
- Casper uses a latex-like proprietary foam as the top layer, while Tomorrow Sleep uses memory foam.
- The Casper, in my opinion, is slightly firmer than the Medium Firm version of the Tomorrow Sleep.
- Tomorrow Sleep has a foam side rail system for extra edge support.
- A lightweight premium fabric makes for a stretchy, breathable cover, which is thin so people can interact directly with the top layers of the mattress.
- The top layer is 1.5 inches of a latex-like specialty polyfoam the company. This material has small holes for breathability — Casper describes the material as “open-cell” — and has good bounce.
- The next layer is 1.5 inches of 3.5 lb. density memory foam, which helps the mattress conform well to the curves of your body. This layer helps with pressure relief.
- The third layer is a “transition layer” of 1.5 inches of polyfoam with a 2.5 lb. density. This layer is supposed to help ensure even weight distribution and ease the transition from the comfort layers to the firm support layer.
- The base layer is 5 inches of polyfoam with a 1.8 lb. density, the same used in many other bed-in-a-box mattresses.
Tomorrow Sleep Medium Soft Construction
- The cover is thin and is a blend of polyester and nylon that doesn’t affect the overall feel of the mattress significantly.
- The top layer is 1 inch of 4.8 lb. memory foam with phase change material. This is a soft material that relieves pressure very well.
- The next layer is 2 inches of 2.5 lb. “airy comfort foam with gel.” It has the feel of memory foam as well but is a little bouncier.
- The support layer is 6 inches of individually pocketed coils. This is a highly supportive and durable material that also helps with motion isolation.
- There is a foam side rail system that provides extra edge support.
- There is 1 inch of stabilizing foam at the bottom of the mattress that the steel support coils can rest on.
Tomorrow Sleep Medium Firm Construction
- The cover is the same as the Medium Soft version and also doesn’t affect the feel of the mattress too much.
- The top layer is 1 inch of 3.5 lb. memory foam with phase change material.
- The next layer is .5 inches of airy comfort foam with gel.
- The next layer is 1.5 inches of “dynamic response foam.” To me, the layer still has the feel of memory foam.
- The support layer is the same as the Medium Soft version but with slightly thicker wire in the coils.
- The side rail system is the same as the Medium Soft version.
- There is also 1 inch of stabilizing foam at the bottom of the mattress in this version as well.
- Casper will have more bounce than Tomorrow Sleep, which has a more quicksand-like feel.
- You will feel like you sink into the Tomorrow Sleep a bit more than the Casper, especially with the Medium Soft version.
- Both shouldn’t sleep hot, but Casper will probably have the advantage in cooling.
- I would expect the durability of the two mattresses to be about the same, with Tomorrow Sleep having a slight edge (coil support system versus foam).
- I believe the Casper is slightly firmer than the Medium Firm version of the Tomorrow Sleep.
The videos below show the differences in feel overall. The Tomorrow Sleep video is for the Medium Firm version. You can see the Tomorrow Sleep is slower to return to its original form. It’s also easier to press my hand down into it, meaning the top layers are softer. I think most people would agree that the Medium Firm version is a bit softer than the Casper. With the Casper, you get more bounce as well.
Motion Transfer Differences
The videos below show off the differences in motion isolation. In my opinion, the Tomorrow Sleep has a slight edge here because it uses memory foam on the top layer. However, see for yourself from the videos.
Pick Tomorrow Sleep If:
- You Want Something A Little Softer– Both versions of this mattress are softer than the Casper in my opinion. If you want something on the softer side, Tomorrow Sleep may be the way to go.
- You’ve Had Success With Memory Foam In the Past– This mattress definitely has a memory foam feel (even though it has a spring support system). If you’ve liked memory foam in the past, you will probably like this mattress too.
Pick Casper If:
- You Want Something A Little Firmer– As I’ve mentioned, I believe the Casper is a touch firmer than the Medium Firm version of the Tomorrow Sleep mattress. This might make it more appropriate for people who just sleep on their stomach or back.
- You Want Some Bounce– The Casper has a pretty bouncy top layer. That makes it easier to move around and switch position in bed. You also won’t get that stuck feeling some people don’t like from memory foam.
These are both high-quality mattresses from high-quality companies. Hopefully I’ve made things more clear. It may also be helpful to see how these mattresses stack up to others by checking out our popular Tomorrow Sleep and Casper comparisons like Tomorrow Sleep vs Bear and Casper vs Tuft & Needle. Don’t hesitate to leave any specific questions in the comments below.
Joe Auer is the editor of Mattress Clarity. He mainly focuses on mattress reviews and oversees the content across the site.
He likes things simple and take a straightforward, objective approach to his reviews. Joe has personally tested nearly 250 mattresses and always recommends people do their research before buying a new bed. He has been testing mattresses for over 5 years now, so he knows a thing or two when it comes to mattress selection. He has been cited as an authority in the industry by a number of large publications.
Joe has an undergraduate degree from Wake Forest University and an MBA from Columbia University.