Best for
- Couples prioritizing quiet motion control.
- Lightweight side sleepers using the medium-soft side.
- Back sleepers using the medium-firm side.
- People who value two firmness choices in one mattress.
Review
SweetNight Clarity Mattress Review
Overall rating
7.3
Mattress typeFlippable all-foam mattress
FirmnessMedium-Soft 4/10 and Medium-Firm 7/10
Best forCouples prioritizing quiet motion control.
See if this mattress fits you
Choose traits
Select what sounds like you
Pick one or more traits above and we will show the strengths and watch-outs that matter for this mattress.
What supports this
Watch-outs
Bottom line
Quick verdict
Skip if
- You need fast latex-like response.
- You rely on a rigid sitting edge.
- You need especially strong trial or warranty protection.
Bottom line
Use the medium-soft side for lightweight side sleeping and the medium-firm side for back, stomach, or combination sleeping. Couples gain strong motion isolation and quiet foam, while frequent movers may find the recovery slow.
Performance
How it actually performs
What this score means
What supports this
Watch-outs
How we reached it
- Back maps were predominantly blue and green with limited concentrated pressure.
- Side testing showed yellow around the shoulder.
Back-sleeper maps were predominantly blue and green with limited concentrated pressure on the appropriate side, while side testing showed yellow around the shoulder. The 4/10 and 7/10 surfaces therefore serve different pressure-relief needs rather than one universal fit.
- Medium-Firm works well for average-weight back sleepers.
- The soft side provides limited stomach-sleeper support at higher weights.
The 7/10 side gave average-weight back sleepers the clearest hip and lumbar resistance in position checks, while the 4/10 side allowed more shoulder and hip travel. That contrast explains why side selection matters more here than it would on a one-sided foam mattress.
- Water-glass movement was minimal and the stationary tester felt only faint motion.
- Large movement near the shared edge remains perceptible.
Water-glass movement was minimal during partner-motion checks, and the stationary tester felt only faint transfer across the foam surface. Larger movement close to the shared edge remained noticeable, so the result is strong rather than completely isolating.
- Twenty-minute checks remained comfortable and near neutral.
- Deep contour on the soft side increases body contact.
Twenty-minute heat checks stayed comfortable and near neutral. The knit cover, gel memory foam, and ventilated comfort foam help temper buildup, but the deeper contour of the soft side still increases body contact for sleepers who run especially warm.
- Concentrated compression recovered promptly.
- Seated testing produced moderate sink, especially relevant at higher weights.
Concentrated compression recovered promptly, and the lying edge stayed usable in hands-on checks. Seated testing produced moderate sink, however, because the all-foam build has no dedicated perimeter rail to resist the focused load of sitting.
- The firm side keeps sleepers closer to the surface.
- The soft side can feel slow during repeated position changes.
The surface took about 1.6 seconds to restore its full shape after pressure was removed. The firmer side kept sleepers closer to the surface, while the softer memory-foam side felt slower during repeated position changes, especially for active combination sleepers.
- Flipping can distribute surface use between two sides.
- Softening, lasting impressions, and edge fatigue should be monitored.
The reviewed mattress used a high-density support-foam core and can be flipped to distribute surface use across both sides. Examples may differ substantially in age and prior use, so impressions and edge fatigue deserve a close check.
- Trial, return, warranty, and delivery terms depend on the seller and listing.
Confirm the written purchase protections attached to the specific listing before buying.
Fit by sleeper type
Will it work for your body and position?
SleeperUnder 130 lb130-230 lbOver 230 lb
Side
Under 130 lb
130-230 lb
Over 230 lb
Back
Under 130 lb
130-230 lb
Over 230 lb
Stomach
Under 130 lb
130-230 lb
Over 230 lb
Combination
Under 130 lb
130-230 lb
Over 230 lb
SleeperUnder 130 lb130-230 lbOver 230 lb
Side
Under 130 lb
130-230 lb
Over 230 lb
Back
Under 130 lb
130-230 lb
Over 230 lb
Stomach
Under 130 lb
130-230 lb
Over 230 lb
Combination
Under 130 lb
130-230 lb
Over 230 lb
Owner feedback
What buyers report after living with it
Sources reviewed
SweetNight catalog and promotion
ContextBrand documentation confirms the Clarity model name and construction. Trial, return, and warranty rights depend on the purchase channel and seller terms.
Sources reviewed
SweetNight catalog and promotion
Brand documentation confirms the Clarity model name and construction. Trial, return, and warranty rights depend on the purchase channel and seller terms.
- SweetNight mattress catalog
Product details checked in 2026.
- SweetNight promotion
Clarity model context.
What to know before buying
Fine Print Check
Fine print
Policy source
Policy details that can change the decision
AreaWhat SweetNight saysWhy it matters
Purchase terms
Confirm the trial, return, delivery, and warranty terms with the seller before purchase.
Coverage and eligibility can vary by seller, listing, and purchase channel.
Model checked
Reviewed model details
Model checkedJul 16, 2026Discontinued
Configuration testedSweetNight Clarity · 12 inches · flippable Medium-Soft 4/10 and Medium-Firm 7/10
The latest model check found that the brand no longer sells this model new.
Inside the mattress
Construction & materials
Breathable knit coverStretch knit textile · Outer surface
Wraps both sides and provides the contact surface. As the surface textile, it chiefly affects the initial hand feel, moisture movement, and how readily heat leaves the sleeper; it supplies little of the mattress's deep support.
Why it matters: Across the SweetNight Clarity Mattress, cooling was assessed at 7.5/10 (Good). Treat the cover as one part of thermal comfort rather than proof that the mattress will stay cool for every sleeper.
Gel memory foamGel-infused viscoelastic polyurethane foam · Soft-side comfort
Creates the deeper-contouring 4/10 side. Memory foam conforms under sustained load, spreading pressure over a larger contact area. Its thickness and position influence contour depth and how quickly the sleeper reaches firmer layers below.
Why it matters: For the SweetNight Clarity Mattress as a whole, back maps were predominantly blue and green with limited concentrated pressure. This is one of the layers most responsible for shoulder and hip cushioning; sleepers who dislike a close contour should compare it with the mattress’s recorded sinkage and recovery.
Ventilated comfort foamPerforated polyurethane foam · Transition
Adds airflow and response between the feel surfaces. This layer buffers the sleeper from the firmer support core and controls how gradually resistance increases as the body sinks deeper.
Why it matters: In the finished SweetNight Clarity Mattress, support and alignment was assessed at 7.5/10 (Good). It becomes especially important for higher-weight sleepers and back or stomach sleepers, who engage more of the mattress depth than lighter sleepers.
High-density support foamHigh-density polyurethane foam · Firm-side support
Provides the 7/10 side's stronger resistance and central structure. This foundation resists deep compression and keeps the comfort layers working on a stable plane; it is not intended to provide the mattress’s initial plushness.
Why it matters: Across the SweetNight Clarity Mattress, durability was assessed at 6.5/10 (Mixed). Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Height12 inches reviewed; a 10-inch version was also sold
Firmness optionsMedium-Soft 4/10 and Medium-Firm 7/10
Available sizes
CertificationsCertiPUR-US certified foams in the reviewed product record