The Casper Mattress Review

This mattress review evaluates The Casper in a medium firmness level — though it is also available in Plush and Firm. The Casper Medium ranks 7 out of 10 on our firmness scale, classifying it as a true medium firm mattress. This medium firm feel provides great support and comfort for a wider range of sleeping positions than softer alternatives. According to our performance tests, the Casper mattress is characterised as best for lightweight to average-weight back sleepers and side sleepers who prefer a medium firm surface.

For strict side sleepers or heavier individuals who prefer a medium soft surface, The Casper Plush offers additional cushioning through softer foam layers. For stomach sleepers and back sleepers who want a bit firmer surface with maximum lumbar support, The Casper Firm delivers firmer foam layers and stronger zoned support for spinal alignment. The Casper One Mattress — the one mattress variant in the lineup — is designed to suit all sleep styles with a balanced medium firm feel and enough support across all body types. The Casper Select rates at 7.0/10 on the firmness scale, making it a bit firmer than the Casper Original if extra support is needed.

The Casper is a great mattress for hot sleepers. The improved airflow and breathability in the mattress — driven by its AirScape® open cell foam top layer and cooling features-integrated mattress cover — deliver minimal heat or sweat retention compared to standard polyurethane foam all foam mattress alternatives. The cooling features score of 8.5/10 in our performance tests reflects how effectively The Casper manages excess heat during the night.

The cooling AirScape® foam top layer uses open cell foam perforations to actively circulate air, while the cooling technology in the eco-knit mattress cover works at the sleep surface level to prevent excess heat buildup from the very first moment of contact. This combination of cooling features — open cell foam ventilation plus surface cooling technology — is why The Casper outperforms most other mattresses in its all foam mattress class for temperature management.

For hot sleepers who require more cooling features beyond what The Casper Medium delivers, Casper Canada also offers the Casper Wave Hybrid Snow — a hybrid mattress with phase change materials in the comfort layer for maximum temperature regulation. The phase change materials in the Wave Hybrid Snow model actively absorb and release heat in response to body temperature, providing sustained cooling features throughout the night.

The Casper mattress is known for its durability and comfort, as confirmed by our in-house testing. The mattress uses high-quality memory foam foam layers to create an ideal sleeping environment that offers spot-on contouring and great support for the body. The Casper signature foam and AirScape® cooling features system combine to deliver a medium firm feel that consistently helps sleepers feel well supported across all sleeping positions.

Key areas such as the neck, shoulders, back, and hips receive excellent pressure relief and pain relief from this premium foam mattress, ensuring rejuvenating sleep. The stretchable, snug removable cover provides a soft-to-the-touch sleeping surface, while the high-quality memory foam foam layers soothe you to sleep as they cradle the body. Many users describe The Casper's zoned support system as particularly effective for relieving back pain — with firmer foam resistance under the hips providing targeted lumbar support that is rare among all foam mattress options at this price. Our performance tests confirmed high customer satisfaction with the initial comfort and lasting medium firm feel of the Casper mattress.

The Casper is a great mattress for couples or those who want to remain undisturbed while sleeping with kids or pets. Whenever we write Casper mattress reviews, we always rigorously test mattresses for motion transfer. While minor motion transfer is noticeable, The Casper performed well during performance tests evaluating surface movement — scoring an 8 out of 10 on our motion isolation performance scale. The Casper earns a great motion isolation designation for an all foam mattress in its price tier.

The memory foam layer and AirScape® open cell foam comfort layer work together to effectively absorb motion before it can travel across the mattress surface. For those who share their mattress with a partner, the Casper can still transfer slight movement — as is common with many memory foam foam mattress designs — but if you're a deep sleeper, the motion isolation on The Casper is more than adequate for a restful night. Our Casper mattress reviews consistently rate its motion isolation performance among the best mattresses in the all foam mattress category in Canada.

The Casper offers a blend of balance and support to prevent excessive sinkage. Overall, there is low bounce sinkage on The Casper, making it easy to get in and out of bed. This mattress is highly responsive and offers supportive body contouring due to the memory foam foam layers built, resulting in quick recovery from body weight and any compression. The AirScape® open cell foam top layer plays a key role in this responsiveness — its open cell structure rebounds faster than standard polyurethane foam comfort layer designs.

Overall, The Casper has adequate support for a range of sleepers, but side sleepers or those looking for a more plush feel may want to invest in the medium soft Plush version, which features softer foam layers and deeper body contouring at the comfort layer level.

The Casper bed offers good edge support, ensuring a restful sleep even closer to the mattress edge. Individuals can lie or sit comfortably on the edge without falling or slipping off, as the ProSupport High-Density Base foam support layer reinforces long-lasting edge support overall. The Casper scores 8.5/10 for edge support in our performance tests — among the highest edge support scores we've recorded for any foam mattress in this price tier and a genuine differentiator from similar mattresses.

This good edge support enhances the usable sleeping surface of The Casper for sleepers who tend to sleep near the perimeter or who sit on the mattress edge to dress. The high-density polyurethane foam support layer resists perimeter compression more effectively than the foam layers found in competing all foam mattress options — making The Casper's edge support a consistent strength across our performance tests. Most sleepers who transition from other mattresses with weaker edge support notice the difference immediately.

Like most foam mattress products, some mild off-gassing may occur when the new mattress is first unboxed — this is normal and typically dissipates within a few hours to a day in a well-ventilated room. Off-gassing refers to the temporary chemical smell that comes with a new mattress. Using a mattress cover or removable cover mattress protector from night one is recommended to keep the Casper in optimal condition throughout the sleep trial.

Bounce is naturally tempered on an all-foam mattress compared to hybrid or latex builds, since memory foam is designed to absorb energy rather than fling it back — but The Casper still earns a strong 9 out of 10 in this category, a standout result for a fully foam construction. Credit goes largely to the AirScape open-cell top layer, which behaves differently than a standard dense polyurethane comfort layer: its open-cell structure rebounds more quickly, cutting down on the sluggish, "stuck-in-place" sensation that's common with traditional memory foam. Underneath, the premium memory foam and high-density ProSupport base add durable, consistent support without dragging the responsiveness down further. The result is a mattress that moves with you more readily than most all-foam competitors, making it easier to shift between sleeping positions without feeling like you're fighting your way out of the surface. It's worth noting that even at this score, The Casper won't feel as springy as a coil-based hybrid — but relative to other memory foam mattresses, this is about as responsive as the category gets.