Casper and Purple are two of the leading brands in the online mattress industry. Casper has a well-built mattress backed by a creative marketing team and a proven track record of thousands of satisfied customers. Purple has made a name for itself with its innovative hyper-elastic polymer grid, whose weightless feel appeals to adventurous sleepers who crave a break from the norm.
This review will compare the flagship Casper vs. Purple mattresses. They share many similarities, including a 3-layer construction and a commitment to quality at a competitive price point. Both are all-foam mattresses that boast above-average pressure relief and motion isolation.
That being said, the Casper and the Purple are markedly different in their comfort layers. The Casper flips the traditional memory foam model upside-down, putting aerated polyfoam on top and memory foam in the second layer to provide a unique blend of contouring and bounce. Purple takes this a step further, omitting memory foam altogether in favor of its proprietary Purple grid, which gives the bed buoyancy and resilience.
Either mattress would be a solid choice, but which is the right one for you? We’ll go through materials, construction, and sleeper ratings, discussing the benefits and drawbacks of each mattress to help you make a decision. We’ll end with some practical information on shipping, sleep trial, and warranty policies.
How Are These Mattresses Built?
The two principal aims of a mattress are to deliver comfort and support the spinal. They usually accomplish this using a comfort layer section made of pressure-relieving materials such as foam or latex, and a support core made of coils, latex, air chambers, or high-density polyfoam. Some mattresses have an extra layer of polyfoam, latex, or micro-coils to ease the transition from the softer comfort layers onto the firmer base.
The quality and type of materials used to make a mattress will affect its performance and durability. Latex is naturally breathable and resistant to sagging. Memory foam and polyfoam offer above-average conforming. Mattresses with coil base layers tend to provide more support for heavier frames. Hybrids capitalize on the benefits of foam or latex combined with the supportiveness of a coil base.
The Casper and the Purple are all-foam mattresses with 3 layers each.
All-foam mattresses are generally known for their advanced pressure relief. They make no noise when bearing weight, and they usually absorb motion. This means that movement won’t transfer across the bed and disturb a sleeping partner. Foam mattresses also have their flaws, the most notable of which are weak edge support and a tendency to trap heat. We’ll examine in depth how the different construction of each mattress affects its performance.
The Casper is an all-foam bed comprising three distinct layers of foam. The cover is made of a polyester-cotton-rayon-lycra blend that contains up to 57 recycled bottles. The cover is non-removable and Casper recommends spot-cleaning in the event of stains or spills. In total, the Casper is 11 inches thick, which is just a bit taller than the average all-foam mattress.
The top layer of the Casper features a proprietary polyfoam called AirScape. This foam relieves pressure points but provides some initial pushback to keep sleepers from sinking too far into the mattress. This is advantageous when changing sleeping positions and for sex. AirScape is an open-cell foam and is perforated, allowing airflow through the holes to help dissipate body heat.
The polyfoam layer is followed by a transitional layer of memory foam, which provides deep contouring and pressure relief. The foam is divided into 3 zones, featuring firmer foams under the hips and lower back and softer foam under the shoulders. This design helps cushion the shoulders to reduce pressure points, while supporting the lumbar area in order to keep the spine even. The memory foam also provides a localized response to pressure that will also reduce motion transfer for people who sleep with a partner.
A high-density polyfoam support core supplies a sturdy base for the mattress. As with most foam mattresses, this support core helps ensure healthy spinal alignment and boosts the longevity of the mattress by reducing sagging.
All foams used in the Casper mattress are certified by CertiPUR-US, which guarantees them to be low in volatile organic compound (VOC) emissions. You may notice some off-gassing odors when the bed is first unboxed, but these should dissipate quickly in a well-ventilated room.
Casper also offers a hybrid version of its flagship mattress, which replaces the polyfoam core with pocketed springs and a foam encasement for reinforced support around the perimeter.
The Purple Mattress is built with a proprietary Grid made of hyper-elastic polymer over several layers of polyfoam. The mattress is 9.25 inches thick overall, which is thinner than the average all-foam mattress. The comfort layers are only 2 inches thick, but the mattress compensates for this with a second layer of polyfoam that plays a dual role in cushioning and support.
The cover is soft and stretchy, designed to maximize the potential of the Purple Grid. It’s made of a viscose-polyester-lycra blend and has a non-slip bottom and non-toxic knit barrier. The cover is spot-clean only, so Purple recommends using a stretchy mattress protector to guard against stains and spills without inhibiting the conforming abilities of the Grid.
The flagship Purple mattress has 2 inches of Purple Grid in the top comfort layer, with a foam encasement around the perimeter to improve edge support. The Grid is designed to flex and buckle in response to pressure, providing localized pressure relief and motion isolation.
However, unlike memory foam, the Grid’s design has a quasi-instantaneous response to pressure. Sleepers will mostly stay on top of the mattress instead of sinking in, and should have no trouble switching sleeping positions. The Grid also allows room for unimpeded airflow through the columns, making the Purple mattress one of the coolest all-foam mattresses we’ve tested.
The second layer is 3.5 inches of high-density polyfoam. This foam has a density of 1.8 pounds per cubic foot (PCF) and adds additional cradling for the sleeper’s body. It’s unusual for a foam mattress to have such a firm layer so close to the surface, and this layer is largely responsible for the firmer feel of the Purple mattress.
The base layer consists of 4 inches of 2 PCF high-density polyfoam. Base layers in most competing mattresses are at least 6 inches thick, but this layer is designed to work in tandem with the transition layer and should provide enough support for most sleepers under 230 pounds.
All foams used in the Purple Mattress are CertiPUR-US certified to be free of ozone depleters and low in VOCs. The Purple Mattress is made in the USA.
Purple also makes a hybrid mattress, the Purple Hybrid, as well as the Purple Hybrid Premier which features thicker layers of the Purple grid. The Hybrid features 2 inches of Purple grid over a transitional polyfoam layer and pocketed coil support core. The Purple Hybrid Premier features the option of either 3 or 4 inches of grid which sits on a transitional polyfoam layer and pocketed coil support core.
How Do The Casper and Purple Mattresses Feel?
The Casper and Purple mattresses are both all-foam mattresses with a fairly similar construction. However, each mattress offers a specific feel due to the differences in its exact makeup.
The polyfoam layer is uniquely located on top of the memory foam layer in the Casper mattress. This gives it more bounce and a quicker response to pressure than most memory foam mattresses. As sleepers sink deeper into the mattress, the memory foam provides a deep cradle. The zoned sections kick in, supporting the heavier areas of the body and cushioning the hips and shoulders. Overall, the Casper provides a feel halfway between sleeping “in” and sleeping “on” the mattress.
The Purple Grid sets this model apart from most other foam mattresses, giving it a feel that’s unlike any of its competitors. The hyper-elastic polymer compresses in response to pressure but keeps the sleeper mostly on top of the mattress. This provokes a floating sensation that minimizes pressure points without the close hug of memory foam. Below, the polyfoam transitional layer adds spinal support. The Purple is much more responsive than a memory foam mattress.
Firmness is a subjective measure that refers to how hard or soft a mattress feels. On a scale of 1 to 10, 1 would be soft as a feather and 10 would be hard as a rock. The vast majority of sleepers prefer a mattress that lies between a 5 and a 7. Side sleepers and those who weigh less than 130 pounds tend to prefer a plusher feel, while stomach sleepers and those who weigh more than 230 pounds tend to need a firmer surface.
The Casper ranks around a 5 out of 10 on the firmness scale, or medium. This is towards the plush end of the spectrum, making it best suited to side and back sleepers and those who weigh less than 230 pounds. These groups don’t tend to sink into the mattress as much, so the surface can often feel subjectively firmer to them. With its zoned memory foam layer, the Casper cradles the hips and shoulders to reduce pressure points.
The Purple is slightly firmer, around a 6 out of 10 on the firmness scale or medium firm. The feel of the mattress changes significantly once sleepers sink past the polymer grid. This means that sleepers under 130 pounds experience a buoyant feel and excellent pressure relief, while sleepers who weigh more than 130 pounds interact with the polyfoam transitional layer and will consider the mattress to be firmer.
This firmness of the Purple is still adequate for side and back sleepers between 130 and 230 pounds, but stomach sleepers and those who weigh more than 230 pounds won’t get enough support.
The Purple is bouncier than the Casper, although both beds have more bounce than the average foam mattress. The Casper accomplishes this with the responsive polyfoam in the top comfort layer. The Purple Grid has a springy feel with an almost immediate response to pressure.
A bed is said to be bouncy when it is made of resilient materials that can quickly recover their shape after pressure is lifted. Responsive components like latex can make it easier to switch positions, as opposed to materials like memory foam that hold their shape and can make a sleeper feel “stuck” in one spot. Although coils usually enhance the bounce of the bed, the hybrid versions of the Casper and the Purple have a similar amount of bounce to their non-hybrid counterparts.
Bounce is important for sex as it facilitates movement and enables rhythm. Couples who prefer a very bouncy surface will likely prefer the Purple, but as far as all-foam beds go, the Casper is also a worthy choice. Neither bed has any noise-producing components, so couples shouldn’t have any trouble when subtlety is called for.
Edge Support and Ease of Movement
For combination sleepers and anyone who shares a bed, two of the most important factors to consider are edge support and ease of movement.
Mattresses that are responsive or that keep the sleeper mostly on top of the mattress tend to allow for easier movement. The Purple and the Casper each succeed in this category, as both mattresses feature a top layer that pushes back against the sleeper and facilitates motion.
Edge support refers to how well the perimeter of the bed holds up when pressure is applied to it. Mattresses that sag when you lie near the edge of the bed can cause feelings of instability. If you share the bed with a partner, this can force each party to shrink toward the center of the bed, thereby limiting the usable surface area. Edge support is also important when getting in and out of bed.
All-foam mattresses are not known for their edge support. True to form, the Casper’s comfort layers compress considerably around the perimeter when weight is applied. Sleepers under 230 pounds may not mind this too much while sleeping near the edge of the bed, but it may cause feelings of roll-off in people who weigh more than 230 pounds.
The Purple is mostly composed of high-density polyfoam, including a high-density polyfoam border around the outside of the Purple Grid. As such, its edges hold up better than most all-foam mattresses.
Temperature neutrality is Purple’s ace in the hole, with its proprietary grid providing much more room for airflow than the Casper’s solid foam build.
The easiest way for a mattress to retain a neutral temperature is by allowing room for airflow. Innerspring and latex mattresses typically succeed at sleeping cool because they have plenty of room for body heat to disperse. In contrast, closed-cell polyfoam and memory foam mattresses often struggle to achieve a neutral temperature. This problem is compounded in close-conforming mattresses, which leave little room around the sleeper’s body and end up trapping body heat as a result.
The Casper mattress attempts to mitigate heat built-up with perforated channels in the top polyfoam layer. This succeeds in keeping the Casper cooler than some competing foam mattresses. That said, the Casper remains a solid-foam bed with a polyfoam core that won’t be able to achieve the temperature neutrality of a hybrid mattress.
When it comes to sleeping cool, there’s no contest between the Casper and the Purple. All of Purple’s mattresses stand out for their top-notch temperature neutrality, as the polymer grid is mostly made up of channels that allow air to flow freely.
The Casper and the Purple are built with quality materials that provide above-average pressure relief. Both mattresses have a moderately firm surface that supports proper spinal alignment in back sleepers and stomach sleepers who weigh less than 230 pounds. Likewise, combination sleepers will be satisfied with either model, as both have a responsive surface that facilitates movement.
Beyond these shared characteristics, each mattress presents distinct advantages in certain areas. We’ll share our recommendations for each mattress, based on our extensive testing and research.
Zoned memory foam in the Casper gives the mattress the deep pressure relief that is needed to cushion hips and shoulders while maintaining spinal alignment in side sleepers. This same memory foam is quiet and absorbs motion transfer, helping to minimize overnight disruptions for people who share the bed with a partner. Those who have trouble getting in and out of bed may find that the Casper’s edges are not sufficiently sturdy.
The Purple grid gives the mattress bounce and helps regulate temperature for hot sleepers. Along with it’s superior edge support, this also makes it ideal for sex. Like the Casper, the materials in the Purple mattress also block motion transfer and reduce partner disturbances.
Both mattresses are built with good-quality foams and fall within a similar range in terms of pricing, on par with other leading all-foam models. However, the Purple mattress is priced lower than the Casper and comes at an extremely reasonable price-point considering the bed’s innovative design.
The Casper and the Purple are both worthy candidates. Ultimately, choosing between the Casper or Purple mattress is a decision that you will have to make depending on your individual needs and personal preference.
The Casper and the Purple both qualify as all-foam mattresses with a high-density polyfoam base, but each model sports a radically different composition in its comfort layers
The Casper is 11 inches tall and has a firmness level rated at medium, or 5 out of 10. After the initial resilient polyfoam layer, the zoned memory foam adds close contouring and pressure relief that is perfectly suited to side sleepers under 230 pounds. Back sleepers in this weight category also receive adequate support to keep the spine aligned.
At just 9.25 inches tall, the Purple has a thinner comfort system with just 2 inches of Purple grid before the transitional polyfoam layer. While the mattress is firmer than the Casper at 6 out of 10, the thin comfort layer makes it most suitable for people who weigh less than 230 pounds. Back and side sleepers under 230 pounds, in particular, exert minimal pressure on the mattress and receive above-average pressure relief and spinal support.
Neither mattress provides enough support for sleepers over 230 pounds, especially stomach sleepers, who typically require a firmer surface to keep the hips from sinking. The Purple Hybrid provides marginally more support, but we would recommend that sleepers who weigh more than 230 pounds choose a firmer mattress with a sturdier support core.
If price is a deciding factor when deciding between the Purple mattress vs. Casper, then the Purple is a clear winner. That said, both companies have been known to offer occasional discounts or bundles.
Casper and Purple currently offer the following models in addition to their flagship mattresses:
- Casper Hybrid: The Casper Hybrid features the same AirScape perforated polyfoam and memory foam as the original, over a pocketed coil support core with polyfoam encasement.
- Casper Element: Formerly known as the Essential, the all-foam Element is Casper’s most basic mattress. Its 10-inch profile comprises a layer of AirScape perforated polyfoam over a high-density polyfoam support core.
- Casper Nova Hybrid: Measuring 12 inches in height, Casper's Nova Hybrid mattress has 3 layers of perforated and zoned polyfoams over a pocketed coil support core.
- Casper Snug: The Casper Snug is a budget-friendly all-foam mattress currently available exclusively through third-party retailers like Target and Walmart.
- Casper Wave Hybrid: The Casper Wave Hybrid features layers of perforated foams and cooling gel pods with zoned support over a pocketed coil support core.
- Purple Hybrid: The Purple Hybrid has 2 inches of Purple grid like the original mattress, but swaps the polyfoam base for a pocketed coil support core.
- Purple Hybrid Premier: The Purple Hybrid Premier mattresses feature either 3 inches or 4 inches of Purple grid over a pocketed coil support core.
Casper and Purple have extremely similar sleep trial and warranty policies. The biggest difference is that Casper offers a White Glove delivery option while Purple does not.
Purple mattresses ship via FedEx. Mattresses are available for purchase in the U.S. and Canada, with an extra shipping fee for orders to Alaska, Hawaii, and Canada. Purple does not offer White Glove delivery or old mattress removal, so we recommend having a friend available to help unbox the mattress.
Casper mattresses ship free via UPS in the U.S. and Canadian provinces, with a fee for Alaska, Hawaii, the Canadian territories, and international orders. Orders are typically sent out within 1-2 days, after which customers can follow the order with a tracking number. Casper offers optional White Glove delivery in the contiguous U.S. and parts of Canada for a non-refundable fee of $149, which includes old mattress removal if needed. The local delivery partner will reach out to schedule a delivery time.
Purple and Casper both offer a 100-night sleep trial starting on the date of delivery for mattresses purchased directly from the companies’ websites. Purple requests that customers wait 21 nights before initiating a return. Casper does not have a mandatory trial period, although the company recommends waiting 30 nights to allow time for the body to adjust before reaching a decision.
For returns, customers should contact the company directly, who will arrange for pickup of the mattress and issue a full refund of the price paid minus shipping charges or other such fees. The Purple sleep trial also includes the option to exchange the mattress for a different Purple mattress.
The Casper and Purple mattresses are both backed by a 10-year limited warranty against material and workmanship defects.
Casper and Purple will repair or replace defective products at the company’s discretion. Purple customers are responsible for shipping costs; Casper customers are not. Casper customers can also choose to pay the difference and upgrade a defective mattress to a better model.
Casper also covers defects in the zipper for the full 10 years, while Purple only extends a 2-year warranty to the mattress cover.