Juno Mattress Review

The Juno Mattress is considered a medium firm mattress and scored 6/10 on our firmness scale. We typically see thinner profile foam mattresses in the budget mattresses category lean toward the firm side of the firmness scale — such as the S&S Firm foam bed from Silk & Snow. In comparison to the S&S Firm, the Juno mattress leans softer, and may feel more similar to the Douglas mattress, which is owned by the same parent company, GoodMorning.

The Juno mattress firmness doesn't necessarily suit everyone. This medium firm positioning means the Juno mattress sits in a broadly usable range for back sleepers and lighter side sleepers, but stomach sleepers and heavier back sleepers who need a genuinely firm mattress for spinal alignment will find the Juno bed insufficient. The medium firm foam density of the Juno mattress is consistent with other affordable foam mattresses at this price point — adequate for basic use but not engineered for the sustained maintenance of spinal alignment support that nightly use demands.

The Juno Mattress comfort layer claims to be infused with cooling gel, however, the 2″ cooling gel foam comfort layer did not outperform other all foam mattresses we tested — like the Endy Mattress — in regulating temperature. For hot sleepers, the cooling gel layer of the Juno bed will likely disappoint.

Customers can upgrade to Juno's Cool+ Cover — a premium mattress cover replacement with additional cooling gel properties — for an additional fee. However, purchasing a cooling mattress protector offers a similar effect at a comparable or lower cost, while also protecting your sleep surface and extending the life of the Juno mattress. A dedicated mattress protector is therefore the more practical investment for hot sleepers who are considering this affordable mattress. The Juno mattress does not include a free bedding bundle or mattress protector in the base purchase — unlike competing foam mattresses from Endy and Silk & Snow that include sleep accessories with every order.

Even as a lightweight sleeper (I weigh 127 lbs), the Juno Mattress didn't impress compared to the comfort of more premium foam mattresses like the Endy Mattress. There was almost no bounce, and I had difficulty moving around on the sleep surface. The flat mattress cover and slow-recovery memory foam comfort layer create a cradling sensation that limits ease of movement across different sleeping positions.

The 8″ height is a genuine concern for most sleepers — other all foam mattresses like The Casper are typically 10″ in height, providing an additional 2″ of foam layer depth to support the body. Without a dedicated transition layer or additional comfort layer, the Juno mattress risks "bottoming out" for heavier back sleepers, stomach sleepers, and anyone with higher foam density requirements. The Juno bed provides basic adequate pressure relief for very lightweight sleeper profiles, but is not a reliable long-term value mattress for most sleepers. For better pressure relief, consider the Endy Mattress or the Silk & Snow mattress.

Memory foam mattresses are known to perform better in motion isolation than hybrid mattress or innerspring designs, and the Juno Mattress was fairly good in this area. In our Fall 2024 tests, we did not observe any significant vibrations during motion transfer isolation testing — a positive finding for a value mattress at this price point.

The 6″ support foam base absorbs movement reasonably well for a basic foam bed, and the absence of pocketed coils means motion transfer is contained within the memory foam layers. For light sleepers who share a bed frame, the Juno mattress provides good motion isolation — though premium foam mattresses from Endy and Silk & Snow significantly outperform it in sustained motion transfer testing.

There isn't significant sinkage on the Juno Mattress — but due to low bounce and the enveloping memory foam comfort layer, the Juno bed contours and cradles the body in a way that prevents ease of movement. If you're someone who moves across different sleeping positions frequently during the night, the flat mattress cover and slow-recovery gel foam layer will create friction and resistance.

A foam mattress option with a quilted mattress cover — like the Endy Mattress — allows for better movement across the sleep surface and aids in getting in and out of the bed frame with ease. The Juno mattress lacks both the quilted traction and the bounce that make all foam mattresses in the mid-range genuinely responsive. For multiple mattress comparisons at this price tier, the Juno bed consistently falls short on responsiveness metrics.

The Juno Mattress does not have a reinforced border or edge support system in its design. A mattress's edge support may be weaker in thinner models, causing a feeling of instability for those sitting or lying at the perimeter. As a lightweight sleeper, this didn't cause significant concern for me personally. However, heavier testers did notice they sank into the support foam foundation when sitting or lying close to the edge — a predictable limitation of a thin, two-layer foam bed without dedicated edge support construction.

The absence of any edge support reinforcement means the usable sleep surface of the Juno mattress is effectively smaller than its dimensions suggest — particularly for heavier back sleepers and stomach sleepers who may drift toward the perimeter. For a guest room or short-term foam bed application, this is manageable. For nightly use, the weak edge support is a meaningful limitation compared to foam mattresses from Endy and Silk & Snow, which feature reinforced perimeter support layer designs.

The off-gassing odor from new foam mattresses typically dissipates within a few days after unboxing. However, the new mattress had a subtle smell that lasted 21 days. We did not measure VOC emissions, so it is likely the Juno mattress stopped off gassing earlier — but if you're sensitive to smell or concerned about harmful chemicals in mattress materials, the extended off gassing period is worth noting. Allow the Juno bed to fully air out in a well-ventilated room before your first sleep, and using a mattress protector immediately will help manage residual odour. Mattress air circulation around the bed frame also helps accelerate the off gassing process.

Bounce is modest on the Juno mattress — a reasonable result for what is a straightforward, budget-focused all-foam build. Juno relies entirely on foam layers rather than any coil support, and foam is inherently better at absorbing energy than returning it, which limits how much spring the mattress can offer. That's not necessarily a drawback for its target audience: Juno is positioned as an affordable, no-frills option, and its more restrained bounce helps keep motion contained rather than amplified. Sleepers looking for a springy, responsive feel likely won't find it here, but for a basic foam mattress built around value rather than performance features, a middling bounce score is about what you'd expect.