Best for
- Side sleepers under 230 pounds using the soft side.
- Back and stomach sleepers using the firm side.
- Couples prioritizing low partner disturbance.
- People who want two widely separated firmness choices.
Review
SweetNight Radiant Mattress Review
Overall rating
7.8
Mattress typeFlippable all-foam mattress
FirmnessSoft 4/10 and Firm 8/10
Best forSide sleepers under 230 pounds using the soft side.
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Choose traits
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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 a strongly reinforced edge.
- You weigh more than 230 pounds and want a deeper support system.
- You need especially strong trial or warranty protection.
Bottom line
Radiant's value is configuration fit: Soft is the pressure-relief side; Firm is the alignment side. Couples gain quiet motion control on either surface. Higher-weight sleepers should pay attention to the 5-inch core and edge compression. The 12-inch configuration has a different build and may feel different.
Performance
How it actually performs
What this score means
What supports this
Watch-outs
How we reached it
- Soft-side maps were largely blue and green through the shoulder and hip for lighter bodies.
- Firm-side shoulder pressure and higher-weight soft-side sink require careful side selection.
Soft-side pressure maps stayed largely blue and green through the shoulders and hips for lighter bodies, while the firm side concentrated more shoulder load. The 2-inch gel-memory foam layer explains the softer side's stronger contour.
- Firm-side back and stomach patterns showed stable weight distribution.
- The 5-inch core provides less support depth for higher loads than a deeper mattress.
Position checks showed broader lumbar and hip distribution on the 8/10 firm side, while the 4/10 side allowed more contour. The 5-inch dense core provides the main resistance, leaving less support depth for sleepers over 230 pounds.
- Water showed only minor ripples and the stationary tester felt no meaningful disturbance.
- Large movement near the edge can still travel through the shared foam slab.
Water-glass checks showed only minor ripples and the stationary tester felt no meaningful disturbance when a partner moved. The continuous foam stack absorbs movement without the rebound and oscillation produced by a coil unit.
- The surface remained comfortable through a 20-minute heat check.
- Soft-side contour creates more heat-trapping contact than the firm side.
The surface remained near neutral through a 20-minute heat check. Gel memory foam and the breathable knit limited short-term buildup, although the soft side creates more body contact and can retain more warmth than the flatter firm side.
- The edge remained secure during ordinary lying use.
- Seated testing produced visible compression and higher weights will increase it.
The edge stayed secure during ordinary lying use, but seated testing produced visible compression. Dense foam restored shape after loading, yet the all-foam build has no separate perimeter reinforcement for people who regularly sit at the bedside.
- The firm side keeps combination sleepers closer to the surface.
- Soft-side contour requires more effort during repeated turns.
Full surface recovery took 1.37–1.43 seconds after loading. The firm side keeps combination sleepers closer to the surface, while the softer side contours more deeply and requires more effort for repeated turns than coils or latex.
- Both surfaces recovered after short-term loading.
- Higher loads increase the risk of impressions and edge softening.
Both surfaces recovered after short-term loading, and flipping can distribute wear between the two sleeping sides. The 5-inch support core and deeper soft-side compression remain the primary stress points for heavier sleepers and frequent edge sitting.
- 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 Radiant page and catalog
ContextSweetNight's campaign identifies Radiant as a gel-infused cooling model. Price and purchase terms are seller-specific.
Sources reviewed
SweetNight Radiant page and catalog
SweetNight's campaign identifies Radiant as a gel-infused cooling model. Price and purchase terms are seller-specific.
- SweetNight Radiant campaign
Model identity and material context.
- SweetNight current mattress catalog
Product details checked in 2026.
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 29, 2026Discontinued
Configuration reviewedSweetNight Radiant · 10-inch default · flippable Soft 4/10 and Firm 8/10
The latest model check found that the brand no longer sells this model new.
Inside the mattress
Construction & materials
Anti-pilling coverSeamless knit textile · Outer surface
Wraps both sleeping surfaces. 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 Radiant Mattress, the surface remained comfortable through a 20-minute heat check. 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
2 inches
Creates the 4/10 contouring side and surface pressure relief. 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 Radiant Mattress as a whole, soft-side maps were largely blue and green through the shoulder and hip for lighter bodies. 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.
Comfort foamPolyurethane comfort foam · Transition
3 inches
Adds contour and separates the two 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 Radiant Mattress, firm-side back and stomach patterns showed stable weight distribution. 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 coreHigh-density polyurethane foam · Firm side and core
5 inches
Creates the 8/10 side and primary structural support. 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 Radiant Mattress, durability was assessed at 7/10 (Good). Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Height10 inches reviewed; a 12-inch version was also sold
Firmness optionsSoft 4/10 and Firm 8/10
Available sizes
CertificationsCertiPUR-US certified foams in the reviewed product record