Lucid 4 Inch Memory Foam Mattress Topper, Full Size – Cooling Gel Bed Topper – Preassure-Relieving Ultra Plush Feel – Ventilated Breathable Design – CertiPur Certified - Dorm Room Essentials
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Availability:
In Stock.
Arrives
Sunday, Sep 27
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Size: Full
Style: 4 Inch
Color: Blue Gel
Features
- Memory Foam
- ULTRA PLUSH FEEL Lucid memory foam mattress toppers are designed to enhance a mattress, making your sleep experience softer; four inches of plush memory foam feels light, airy, and responsive
- COOLER SLEEP: Cooling gel is infused in the memory foam to help regulate your sleep temperature and keep you comfortable all night long; precision-cut ventilation channels help increase airflow to keep you cooler
- CHOOSE YOUR SIZE: 2-inch profile adds a soft layer of support to any mattress; 3-inch profile is very plush and adds even more comfort; 4-inch profile has an extra deep, plush, sink-in feel
- 3-YEAR WARRANTY: This mattress topper is assembled with CertiPUR-US certified foam and backed by a 3-year limited warranty; use with a waterproof mattress protector for best results
- SHIPS IN A BOX: Mattress topper is compressed and shipped in a box for ultimate convenience; when it arrives, simply unroll it and allow 24-48 hours to fully decompress
Description
The LUCID 4 Inch Gel Memory Foam Mattress Topper adds new life to and enhances the comfort of an existing mattress. LUCID's thickest mattress topper, this ultra thick comfort layer is made of plush, gel infused memory foam for supreme comfort. LUCID memory foam compresses evenly beneath the unique weight and shape of a body, conforming to curves to relieve pressure at the shoulders and hips. Top quality foam is infused with advanced gel material that captures and distributes heat for a more comfortable sleep temperature. Mattress topper has a ventilated design that improves breathability for refreshing sleep.
Brand: LUCID
Color: Blue Gel
Size: Full
Fabric Type: Memory Foam
Special Feature: Cooling
Brand Name: LUCID
Age Range Description: Adult
Model Name: 4 Inch Gel Memory
Number of Items: 1
Manufacturer: LUCID
UPC: 848971052020
Unit Count: 1 Count
Number of Packs: 1
Global Trade Identification Number: 20
Included Components: Mattress Topper
Item Type Name: 4 Inch Gel Memory Foam Mattress Topper - Ventilated Design - Ultra Plush - Full
Model Number: LU40FF30GT
Manufacturer Part Number: LU40FF30GT
Manufacturer Warranty Description: 3-year warranty against manufacturer's defects.
Other Special Features of the Product: Cooling
Closure Type: Pull On
Water Resistance Level: Not Water Resistant
Item Firmness Description: Ultra Plush
Fabric Type: Memory Foam
Product Care Instructions: Spot Clean Only
Material Type: Memory Foam
Size: Full
Color: Blue Gel
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Sep 27
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: Queen
Style: 4 Inch
Color: Blue Gel
Well my mom came to me and asked one visit if I could find her a good 4 inch mattress topper for 150.00 or less and since a latex topper was out of the question due to her budget, I immediately thought of Lucid. I don’t actually have a Lucid topper, I have a different brand but when I was searching for my own topper a few years back, I almost went with Lucid because they have a metric ton of reviews and their rating is high and very few of them are negative giving how many purchases there have been. Well let me tell you, I’ve been hearing about this topper every morning for two days. My mom set it up on her bed to let it inflate and expand in the morning and she called me to tell me that half the day later it looked great. She ended up sleeping on it that night and she called raving the next morning to tell me how much she loved it and that she’s never slept better and that she should have ordered one years ago. She said she absolutely I didn’t want to get out of bed and that she couldn’t wait to go back to bed. Well she just called me again this morning, morning too, and you know what she said? “They’re right you really should wait a full 24 hours before sleeping on it. Then she began to tell me how how there is something about this mattress topper. She just can’t explain it, can’t put into words and that night two was even BETTER than night one. “Thank you thank thank you you are the best daughter EVER!!” “You knew exactly what to get me, this is perfect!!” “It”’s so soft and so supportive, it is such a dream!!” Seriously she’s been raving about this topper so much that I absolutely plan on ordering another one for myself lol. Oh let me clarify her mattress situation. She had a mattress that she had put in storage probably 10 years ago. She barely used it. Well she has been using the mattress for a few years and had gotten a topper for a different mattress maybe 5 or 6 years ago. When she moved she brought out the old barely used mattress and was using the topper she had been using but that topper finally broke down and had a dip in it. Her mattress may be fairly unused but it’s old. Kind of like buying a basic smartphone with chintzy features. Sure the device might be brand new but the tech inside is from the electronic Stone Age. That’s her mattress. In the world of mattresses, it’s old tech LOL. This topper and a mattress cover I got to go with, brought that mattress into 2022. She absolutely adores it, so much so that I will be getting one to put on top of my mattress even though I have a 3 inch latex mattress topper. I want to experience “THE DREAM” my mom has been raving about for two days. So not only do I recommend it to you, I recommend it to myself! Just be sure to lay it out and give it a full 24 hours to rise. It will look like a flat lumpy pancake when it first comes out the package, believe me, it fills out to fabulous awesomeness after 24 hours.
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Reviewed in the United States on February 26, 2022 by LibE
Size: Queen
Style: 4 Inch
Color: Blue Gel
Let me start off by saying this isn't a paid review. Memory foam's quality isn't just reliant on density. The measure of density of memory foam gives it a Ultra Plush/Plush/Medium Plush/Medium/Medium Firm/Firm/Extra Firm feel. In order for memory foam to BE plush, it has to be low density. The reason Tempur-Pedic doesn't offer low density memory foam (Tempur-ES 4.1 LB Foam & Original Tempur 5.3 LB Foam) is because they distinguish themselves that way. I've used Tempur-Topper Supreme (3" Tempur Original 5.3LB Memory Foam), and it's super high quality, but that Topper is meant for people who like firm mattresses, and I can say the same thing about the 3" Tempur-ES Memory Foam. I've flipped between this memory foam topper, and a Tempur-ES topper. The Tempur-ES is nice, and you can move around easier, but I never feel like I'm being cushioned and like I'm relaxed. You sink in to the Lucid 4" topper, and my body physically relaxes, and I feel cushioned. I wouldn't even go as far to say the Lucid 4" topper is plush, but in order to be a comfortable foam, you will have to sink in quite a bit, or else you're just laying on expensive concrete. Memory Foam is meant to be inexpensive - Memory Foam is cheap to make as they're basically just made of fossil fuels. Don't judge this topper by the price. I first tried a 3" Memory Foam Topper here on Amazon, since the topper had like a 4.9/5 on 100+ reviews, but I don't think that topper was memory foam, and was just basic polyurethane foam. The memory foam had no squishy feeling, and the imprint recovery was almost instant. The Lucid 4" Topper has a fairly slow recovery from imprint time given the Lucid Memory Foam's density. My parents back pains got better when I got them the 4" Lucid Topper. If you're a normal person, and you keep an open mind, then this Lucid 4" Memory Foam Topper is the best thing to make you sleep extra deeper, and sleep longer period or times. I went back to the Tempur-ES topper for 3 months, and that was the dumbest decision I've made in the past few years. My body oozes with relaxation and comfort on the Lucid 4" Topper now, of which never has happened w/ my Tempur-ES topper. Once you get the 4" Lucid Topper, be prepared to be hard to move around if you want to flip over in the middle of the night, but I flip positions 60-70% less w/ the Lucid Topper compared to the Tempurpedic-ES memory foam topper. I use the Lucid King Pillow hybrid as a pillow, the Lucid body pillow I hold on to w/ my arms when I lay on my side, and the basic Lucid memory foam pillow for in between my legs. The side sleep system I use is the best way to sleep. I do hear the Serta Perfect Sleep Luminous Plush Pillow Top is nice, but I can't imagine anything being more comfortable than the Lucid 4" Topper. Enjoy! -Andy R.
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Reviewed in the United States on January 26, 2022 by Amazon Customer
Size: Queen
Style: 4 Inch
Color: Blue Gel
This is fine, its not going to work for us as a topper, its actually going under our mattress to boost the height of our bed, we tried it on top, and it was just too soft for us. I bought this using the buy it again button from one we bought for our rv, but its not the exact same, the first one was firmer. I will be cautious about using the buy it again button in future, but otherwise happy.
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Reviewed in the United States on July 11, 2026 by andy
Size: King
Style: 4 Inch
Color: Blue Gel
Remove your packaging carefully and save it! Also, use a mattress protector, in case you need to return it. After we had purchased a mattress that was a bit too firm, we decided to try out this 4" topper. It filled out quickly, after removing the packaging. It worked like a charm, but after a few nights, we realized it was a bit too "sinky" for us. It was awkward to roll over (and other movement as well, lol) it took some effort. (I'm 135lb, husband is 200lb). (It has cooling gel, which made it comfy temperature wise. ) But, I was definitely nervous about sending it back. I didn't know how I was going to get it back in the box. My chat agent told me to get a bigger box from the UPS store, and they would reimburse me for it. (You just need a photo of the receipt, it's super fast. Just wait until they receive the mattress back, then get on chat to ask for the reimbursement. Within minutes I had my credit) Anyways, here's how I got it in the box....first have the box taped good on one end, and ready to go. Having two people would probably be easier, but I did this myself. I layed the plastic packaging out on the floor, then the thin styro sheet in the middle. I realized the topper must have been folded in thirds (king size). So I folded it in from the sides. Then, I sealed the packaging. I tightly roll it from the top down to the bottom edge. (You may need to let some air out.) I again taped in place, but still held onto it tightly as I lifted it into the box. (Not sure the tape would have held up to the pressure of letting go.) Once you have it pushed into the box, you can let go. The box may bulge a bit, but with help (or by sitting on it) you can hold the box closed while you tape it up. I used a lot of tape, to be safe! I had a pick up scheduled by my chat agent, so all I had to do was keep the box near the door. It was picked up a day later, and a couple days later it was received, and my refund was processed. I got back on chat to get my box reimbursement.
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Reviewed in the United States on October 20, 2021 by Brandy C.
Size: King
Style: 4 Inch
Color: Blue Gel
So comfortable. A slight smell when I opened it but that went away quickly. Laid it out on the bed at like 8am and left it all day and have been sleeping on it for about a month now. We got the 4inch blue king, seriously like sinking into a cloud. My husband and I both fall asleep so fast, stay asleep better and have less aches. Its on top of a very firm hybrid mattress. It not as cooling as I thought but it is cooler than my mattress. Worth the money in my opinion.
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Reviewed in the United States on June 20, 2026 by Kelsay
Size: Queen
Style: 4 Inch
Color: Blue Gel
This is the second memory foam topper i got and I am writing a review in case it helps someone. Because buying big bulky things and returning them is a pain in the butt so maybe this can help you in your buying decision. I am hunting for a topper a very hard, awful futon mattress that was advertised as 8" but was actually 3". I should have returned it right away but didnt' want to deal with return hassle (I learned my lesson now and regret that decision so much). I plan to chuck the whole futon in a year or two so I don't want to buy a new matress and am just looking for a topper to make it comfortable. A few weeks ago I got the linenspa 2" topper, and people wrote in reviews it was like sleeping on a cloud. I got it and was like what cloud? A concrete cloud? it was hard. Old me would have just suffered in silence, worried about the return process, but new me is like stop keeping things you don't love. And sleep is important. Returned that one, got this one in 4". I am 210 pounds now and 5'8 (gained weight post-Covid), an average looking albeit slightly tall woman, a size 14 hourglass (not apple) shape. My heaviest parts, like most people I guess are my hips/waist area. I am a side sleeper who cannot sleep on her back no matter what. THis grew to 4" with an hour, but I let it air out for over a day. i had chatted with lucid and they said waiting 2 days wasn't necessary. Cool! I put it on my bed (*good tip, btw, is I only put the fitted sheet over the topper, not the topper + mattress. so easy to make the bed) and tried to sleep in that night. The following happened each and every night I tried to sleep on it (i tested it for 3 nights): Sleeping on my side, my hips sunk down dramatically. Not all the way down to the mattress below it, but down significantly (I'd guess 2"?). Your body is absolutely not evenly supported (may be different if youre a back sleeper). Imagine your body jut being misaligned all night bc only your hips are sinking into a pit, but the rest of you is not sinking in. When I turned on my back I didnt seem to sink much at all but i just cannot sleep on my back. I feel like my muscles were fighting all night to just keep my body somewhat aligned and woke up feeling mildly like my muscles had been working all night, and not in a good way. I was not rested at all. Your spine, neck etc are supposed to be aligned when you sleep. With this topper, that is absolutely impossible at least for my body (and later, my husband's too, you'll see.) this happened each night (I did give it a few nights' test to give it a chance to see if anythng would change, before I unequivocally decided I need to get this out of the house.) I also woke up each night sweating. Hot. And When I wanted to get out of the bed to go to the bathroom, I had to like catapult myself out because I had sunken in. And if i wanted to flip from my left to right side, again, had to catapult. The absolute worst part is, I have felt completely dizzy (i put dizzy and dizziness in the headline so if anyone searches those words in reviews, like i did last night, it would show up) with my head spinning and like an electric shooting sensation in my right leg (edit/update: when i wrote the reivew, i hadnt returned it yet. i returned this i think over a week ago and still am having massive problems with my right leg which only started when i used this foam. i am now convinced i have a pinched nerve from this topper and am going to see a neurologist. the diziness ended the morning after we boxed this up to return it, but my leg issue persists- it's now weak, there's an electric shooting sensation, knee slightly bucking etc. ive never had a pinched nerve before but i looked it up and the symptoms match up) i have been dizzy only since I started using this to the point where I could not fuction rightly during the day. Felt crazy lightheighted and unable to focus, to the point where I was searching like mad last night "dizziness and memory foam" - turns out other people have reported this issue with memory foam in general. Look it up. Some people may not be as sensitive. I'm not a "everything must be natural" type but maybe i'll become one after this experience. (update: we packed it up for return after 3 days of using it and feeling dizzy - the morning after boxing it up, the dizziness was gone and has not returned.) My husband crawled into bed with me for a few minutes and we weigh about the same, so when our bodies were both sunken in at the same time, it wasnt as bad as when I was alone in it, with the matress sunken in all around me like i was in a sandpit. But i often sleep alone bc I snore :-) Last night he slept it in alone to test, and he didnt sleep all night. He sunk in too much and just couldnt sleep. He is about 5'11 205 pounds. That was good to know. I was going to return it anyway, whether he liked it or not, bc apparently my body can't handle memory foam at all, I cant let my body be dizzy and have weird neurological symptoms. But he woke up this morning and said "i dont like it. I couldn't sleep all night." I said why? He said he was sinking. But he was delirious from no sleep and went into the other zinus comofrtable bed to pass out, so I didn't get more info out of him. So I am done with memory foam for life and am going to line the top of my mattress with many, many blankets, if that doesn't work, I will try latex or wool. (edit: i tried topping my crappy mattress with many blankets and that didn't work. too hard and painful. next im going to try sheepskin and if that fails, latex.) Maybe you will have a different experience, if you're a back sleeper etc. I have read this memory foam is not high density so it's not supportive. Ive read some people love that sunken in feeling but I would caution, if only certain body parts or sinking in, it is really not good to spend 1/3 of your life in a misaligned position. I watch youtube videos for side sleepers and physical therapists and docs talk about the importance aligning our neck, shoulders, hips, and knees while youre laying down, the point of strategic pillow placement to make sure everything is aligned. This memory foam is not only not conducive to that, but actively hurts my alignment. Lastly, the return issue. I havent hit the return button yet but no mater how difficult it is to return, if you dont like something, you dont need to chuck it or live with it, aslong as you are in the return window. My husband and I will smoosh i down and roll it up and if it doesnt fit, will buy a bigger box and amazon can refund us for the box, but i bet it will fit in the original box. (update, it did. return process was great!!) Sleep is way to important to just "suck it up" - and it seems as though it is common for people to hav to try a few different toppers to find the one that is right for them (do you want 2,3,or 4"? latex? memory foam? wool? featherbed? soft, medium or hard?). It would be best to get a mattress that doesnt need a topper in the first place (I still love my zinus 10" we have in the other room!) but if youre like me with a weird matress situation I understad your plight. I hope this review helps someone. i know it's a hassle for both buyer and seller to mail and return these big bulky things so im trying to help people make decisions.
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Reviewed in the United States on December 24, 2023 by sunnydaysahead
Size: King
Style: 4 Inch
Color: Blue Gel
Absolutely LOVE this mattress topper! Purchased a new (expensive)mattress less than a year ago and have been having terrible issues waking up throughout the night with shoulder and hip pain (age related). I purchased the king size 4 inch memory foam. I chose to put this under our mattress pad (luckily my mattress pad has extra deep pockets and fits perfectly). I have finally slept throughout the entire night without any pain this past week! A total WIN for me! have just ordered another 4 inch one for our queen size bed for our RV! I can’t recommend this product enough! I had no issues whatsoever opening it up and letting it air out for 7 hours before putting on bed (maybe because it was a nice summer day….it unfolded itself without any assistance from me).
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Reviewed in the United States on July 23, 2026 by Rachael J. Nikkola
Size: Full
Style: 4 Inch
Color: Blue Gel
I've had this mattress topper since March of 2020. Now that it is at the end of its life, here's a review of what was good and bad about it, touching on all its marketing points: 1) Man, it was cozy. There's no getting around it. Despite all the downsides, I never felt compelled to yank it off the bed and go without. The body cradling is very real, especially if you're heavier like I am. I've always loved that feeling. However, it does not distribute weight evenly. It did some in the beginning, but that went away quickly. You really just sink in, and it can make it arduous to turn over, adjust, or get out of bed. 2) The reason I am replacing it is because it has ripped down the middle, despite flipping it often. This mattress topper was known for cracking and for little chunks splitting off from it often, particularly around the edges. I knew it was only a matter of time before it decided enough was enough and develop a big rip and unfortunately that time has come. 3) This thing is hot. Hot hot. There was nothing cool or breathable about it. The little holes in the topper did nothing but what I just talked about - shredded and flaked. I would have my window open on a winter's night (right next to my bed) and a fan on me at the same time and the parts of my body touching the topper would NOT cool down. 4) It never stayed put. It slid all around my mattress constantly. As someone who tosses and turns in the night due to medication impacting my quality of sleep, this could sometimes be a nightmare. 5) This did not relieve my back or pelvic pain. It was cozier than some mattresses, but when you sink in so much, any sleeping position can feel comfortable. I end up sleeping like a shrimp, don't realize it, and wake up sore. 6) When I originally got the topper it unrolled, evened out, and got rid of its funky smell just as the product description describes - one to two days. 7) This product is no longer blue. The blue faded to beige over time (not just where I laid - the entire thing faded). 8) Not sure why the listing says machine wash? Don't put it in the washer. Get a mattress protector and spot clean as needed. If you try to put it in the washer it's going to shred apart. 9) This thing makes changing your sheets or standing on it to reach something on the wall a nightmare. You just sink in. It's one of those points that doesn't get talked about cause it's niche, but be prepared to fight with it come sheet change days. This product served me as well as it could for these last four years so it gets a loving three stars from me, but I will not be purchasing again. Too hot, too much hassle, too much frumpy looking bed. I will be going with a regular mattress with no topper or, if I desperately desire the comfort of a topper again, will look for another option.
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Reviewed in the United States on July 2, 2024 by Sayer