If you've been lying awake at 3am on a mattress that's either too firm, too hot, or just plain tired, you've probably typed some version of "best mattress topper" into a search bar. And at some point, Lucid and ViscoSoft are going to show up next to each other. They're both gel-infused memory foam. They're both sized for queen and king beds. They both have thousands of reviews. So which one actually does the job?
The short answer: Lucid wins for most people. It costs less, comes in more thickness options, and has a cooling gel layer that performs well enough for moderate hot sleepers. ViscoSoft has a genuinely denser foam and a fitted cover option that some sleepers prefer, but those advantages come at a real price premium that's hard to justify unless you know you need them. I'll walk you through exactly where each one wins and loses so you can make the call for your specific situation.
| Lucid 3-Inch Gel Memory Foam | ViscoSoft 3-Inch Gel Memory Foam | |
|---|---|---|
| Price (Queen) | $99.99 | $139.99 |
| Foam Density | 3 lb/ft³ | 4 lb/ft³ |
| Thickness Options | 2", 3", 4" | 3" only |
| Cooling Mechanism | Gel infusion + ventilation holes | Gel infusion only |
| Cover / Fit | Elastic straps (no cover) | Fitted quilted cover included |
| Amazon Rating | 4.4 stars (103,691 reviews) | 4.5 stars (~18,000 reviews) |
| Off-Gas Duration | 24-48 hours typical | 48-72 hours typical |
| Size Range | Twin, Twin XL, Full, Queen, King, Cal King, Split King | Twin, Full, Queen, King |
| CertiPUR-US Certified | Yes | Yes |
Where Lucid Wins
The clearest advantage Lucid holds is price. At $99.99 for a queen, it undercuts ViscoSoft by about $40, which is meaningful when you're already spending money on something that goes on top of a mattress you already paid for. That price also buys you access to more thickness options: the 2-inch version works well when your mattress is only slightly firm, the 3-inch handles most pressure-point complaints, and the 4-inch is basically a second mattress for severely beaten-up beds.
The gel-infusion and ventilation holes are the other reason Lucid makes sense for hot sleepers. Memory foam traps heat by nature, gel infusion counteracts some of that, and the small perforations punched through the Lucid foam allow air to circulate rather than pooling underneath you. ViscoSoft uses gel too, but without the ventilation holes the surface tends to run about 2-3 degrees warmer by midnight according to several longer-term user reports. If you're a hot sleeper, that gap matters.
Where ViscoSoft Wins
Foam density is the one spec where ViscoSoft is genuinely superior. At 4 lbs per cubic foot versus Lucid's 3 lbs, the ViscoSoft foam is more resistant to permanent compression. That means it's going to recover its shape better after a year of nightly use. If you're a heavier sleeper (over 230 lbs) or you tend to sleep in the same body position every night, low-density foam develops permanent body impressions faster, and ViscoSoft's denser construction pushes that timeline out meaningfully.
The included fitted cover is a detail that sounds minor but matters in practice. Lucid uses elastic corner straps to hold the topper in place, which works fine on most mattresses, but can slip on deeper mattress profiles or if you move around a lot in your sleep. ViscoSoft's quilted cover fits over the whole top of the topper and stays put better. It also adds a soft layer between your fitted sheet and the raw foam, which a small number of sleepers find more comfortable.
Your mattress isn't the problem. The topper is.
The Lucid 3-inch gel topper is the most-reviewed mattress topper on Amazon for a reason. Over 103,000 buyers, 4.4 stars, and a price that doesn't require a financing plan.
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How They Feel Night to Night
Memory foam toppers all have a similar feel in the first few minutes of lying down: that slow, sinking sensation where the foam takes the shape of your body and then holds it. Both Lucid and ViscoSoft deliver this. The difference shows up in how firm the initial resistance feels. Lucid's 3 lb density gives a softer, quicker sink. ViscoSoft's 4 lb density pushes back more before it conforms. If you're switching from a firm innerspring mattress and you want immediate pressure relief, Lucid will feel more satisfying on night one. If you prefer a foam that feels supportive rather than plush, ViscoSoft's denser construction might suit you better.
One thing worth noting for back pain sufferers: both toppers work best when your existing mattress is medium-firm to firm underneath. A topper can't compensate for a mattress that's already sagging in the middle. If your mattress has a visible body impression deeper than about an inch, a topper will conform to that sag and replicate the problem rather than fix it. Assuming your mattress is structurally sound, either topper will improve pressure-point comfort measurably. Most buyers with hip and shoulder pain report relief within the first week.
Lucid has more reviews than almost any mattress topper on Amazon, and the rating has stayed above 4.4 through 100,000 of them. That's a harder number to fake than a smaller sample with a higher average.
The Off-Gassing Question
Both toppers need to air out after unboxing. Memory foam is compressed for shipping and releases a chemical smell when it expands. This is normal and not harmful with CertiPUR-US certified foam, but it's genuinely unpleasant for 24-72 hours. Lucid's lower density foam typically airs out faster, around 24-48 hours in a ventilated room. ViscoSoft's denser foam tends to run closer to 48-72 hours. Neither is dangerous, but plan for this: unbox on a Tuesday, not a Friday night.
If you're particularly sensitive to smells, both brands offer the same fix: unroll the topper, lay it flat in a well-ventilated room or even outside in dry weather, and let it breathe for two full days before sleeping on it. Do not unbox it and immediately put a fitted sheet over it. You'll lock the off-gas smell in and then wonder why it persists for a week.
Who Should Buy the Lucid
Lucid is the right call if you're a hot sleeper who wants real cooling without paying a premium, if you need a size that isn't queen or king (particularly Split King), or if you want to match your topper thickness to a specific mattress feel. It's also the practical choice if you're not sure whether a topper will solve your sleep problem and you don't want to spend $140 on an experiment. The 103,000-review track record means you're not guessing on an untested product.
Side sleepers and back sleepers with hip or shoulder discomfort generally do well with the 3-inch version. If you're a stomach sleeper, go with the 2-inch; the 3-inch can put your spine into an uncomfortable extension if you're already face-down on a plush mattress surface.
Who Should Buy the ViscoSoft
ViscoSoft earns its place if you're a heavier sleeper concerned about how a topper will hold up over two or three years. The 4 lb density foam is genuinely more durable, and if foam longevity is your deciding factor, paying the extra $40 is defensible. The fitted cover is also a real selling point if you have a deeper mattress profile (over 14 inches) where elastic straps tend to pop off.
It's also the right choice if you've tried lower-density memory foam before and found it felt too soft within six months. Foam compression is the most common long-term complaint about budget toppers, and ViscoSoft's denser construction delays that meaningfully. Just account for the fact that it runs slightly warmer.
103,691 buyers have already tested this so you don't have to.
The Lucid 3-inch gel topper is the most-reviewed option in its price range. Available in 2", 3", and 4" thickness and every standard bed size including Split King.
Amazon Check Today's Price on Amazon →