LUCID 4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King
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Availability:
In Stock.
Arrives
Saturday, Feb 14
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Size: King
Style: 4 Inch
Pattern Name: Topper Only
Features
- Memory Foam
- PLUSH MEMORY FOAM FEEL: Add 4 inches of thick, plush gel memory foam to your bed to create a soft and conforming feel that cradles your body while you sleep
- COOLING GEL INFUSION: Contouring memory foam is infused with gel material that captures and dissipates heat for a cooler memory foam experience
- DESIGNED FOR BREATHABILITY: This thick topper provides comfort and softness without sacrificing breathability. A ventilated design improves airflow so you can sleep cool and comfortable
- ELEVATED PRESSURE POINT RELIEF: Upgrade your old mattress with this memory foam topper that distributes weight evenly and conforms to your curves for targeted pressure point relief
- SHIPS IN A BOX: Rolled and shipped in a box, this topper meets the highest safety standards; just open it and give it 24-48 hours to decompress and shed the new foam scent; 3-year warranty
- PLUSH MEMORY FOAM FEEL: Add 4 inches of thick, plush gel memory foam to your bed to create a soft and conforming feel that cradles your body while you sleep
Description
Mattress Topper.
Brand: LUCID
Color: Blue
Size: King
Fabric Type: Memory Foam
Special Feature: Gel Memory Foam
Brand: LUCID
Color: Blue
Size: King
Fabric Type: Memory Foam
Special Feature: Gel Memory Foam
Closure Type: Pull On
Product Care Instructions: Hand Wash Only
Water Resistance Level: Not Water Resistant
Age Range (Description): Adult
Material: Memory Foam
Model Name: LUCID 4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King
Number of Items: 1
Manufacturer: LUCID
UPC: 848971052044
Item Firmness Description: Extra Plush
Global Trade Identification Number: 44
Product Dimensions: 79 x 75 x 4 inches
Item Weight: 27 pounds
Item model number: LU40KK30GT
Is Discontinued By Manufacturer: No
Refill: foam, gel, memory foam
Water resistant: not_water_resistant
Specifications: certified frustration-free
Assembly required: No
Warranty Description: 3-year warranty against manufacturer's defects.
Batteries required: No
Included Components: Mattress Topper
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Feb 14
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: King
Style: 4 Inch
Pattern Name: Topper Only
Size & Weight I purchased the 4 inch Lucid topper for my 14 inch King Size mattress. It fits well to all 4 corners. The topper is kind of heavy but not impossible to move. According to the box, it weighs 26.85lbs. It will feel heavier because the object is large and the weight is spread over several square inches. To move it, Grip the topper firmly, but with care and you shouldn't get tears or any other issues. Authenticity First, be sure you are buying an Authentic Product from LUCID. It should come in a box marked with the company's name on it, see the images. Likely, some reviews could be showing a blue topper that looks similar to the Lucid Product but it may be a knock off. I've seen some that are light blue like Lucid's, but it isn't the same. It has a knock off name. According to the box, mine was manufactured in Vietnam and came with a booklet and a free mail/envelope opener. ( Should you buy, yours may be manufactured else where ) Packaging & Expansion. The images you see were taken 1 minute after I opening the vacuum bag. I should have taken an image of it in the bag. It was vacuumed down to about 1 inch of uniform thickness. The topper expanded rapidly after opening and it took about 1 minute to fully expand. Again this is a genuine Lucid product. I see of some reporting it taking days or several hours to expand and even having to place it in a higher temp environment for this to occur. My A/C was set at 72dgs and the room temp was the same. Still, it expanded in 1 minute, which is nearly instant. Smell The topper does have a light smell similar to new carpet but it isnt over powering and honestly, after about an hour or so after opening it, I could no longer detect the smell. Feel I chose the 4 inch because I like that " sink in your bed" feel, which can be great for reducing back and neck pain. The 4 inch is super plush. Because the 4 inch is the thickest and softest, you will sink the most. Some will like this and some won't. Some will mention they don't like crawling out of a hole in the bed...honestly I wouldn't want that either so for the best results, I added a plush pillow top sheet cover to mine. This keeps the soft sink feel but allows you to have no trouble getting out of the bed and I couldnt ask for a better combo. IT MADE MY CHEAP 14inch WALMART MATTRESS FEEL LIKE THE SIMMONS BEAUTY REST HOSPITALITY BEDS IN PREMIUM HOTELS! Both of these are breathable and cool so no night sweats! ( this may vary as no two people are the same ) Also if you sleep with a partner, movement on one side of the bed with this topper won't disturb! Final Recommendations I do not recommend buying this topper for completely worn out matresses, or Stomach sleepers unless you have full size body pillows. But if you sleep on your back or sides and you don't want any back pain and you love the sink in feel, then this is your topper. Also be sure to identify your comfort needs BEFORE you buy.
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Reviewed in the United States on September 18, 2025 by DD1550 DD1550
Size: Twin XL
Style: 4 Inch
Pattern Name: Topper Only
Super comfortable! It is very plush and thick as I did order the 4 inch topper. It did smell a bit when I first opened the package but the smell dissipated after a few hours to a day. It is very high quality and decently durable. I saw some other reviews that said that their topper ripped but I think that was only a problem with the larger sizes such as king and queen as the twin xl one that I ordered did not rip at all and I do roll around a lot in my sleep. I didn’t buy the cover for it so it did slip around but if you but the non slip cover it should be fine.
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Reviewed in the United States on January 5, 2026 by Emma P
Size: King
Style: 3 Inch
Pattern Name: Topper Only
I was hesitant at first because when I opened the box this was clearly expanded. I saw the tear in the plastic but the backside was still vacuum sealed so I kept it. This is the most comfortable topper Ive owned. My Husband and I have slept well and woke up without back pain. I highly recommend this.
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Reviewed in the United States on January 15, 2026 by AHY
Size: Queen
Style: 4 Inch
Pattern Name: Topper Only
I had begun to dread bedtime due to pain in my hips. The 4 inch topper has made my bed so much more comfortable. It has a slight smell which doesn’t really bother me. It does not cool, but it doesn’t make me too hot.
Reviewed in the United States on January 19, 2026 by jastex
Size: King
Style: 4 Inch
Pattern Name: Topper Only
Absolutely totally impressed by Lucid’s customer service team!! Over the last 10 years or so, I have purchased 3, 4” toppers for my bed and 2 or 3 other mattress toppers (3” I believe)for other family members beds in my home. We have good mattresses, but the best way I have found to make them last COMFORTABLY longer is to put a memory foam mattress topper on them - As well as the fact that there is nothing better for a GREAT NIGHTS SLEEP than crawling and then up into a soft, comfy “feeling like you are sleeping on 12” of goose down comforters “ bed. Lucids’s 4” memory foam mattress does just that- makes your bed feel soft and warm and comfy a just as if you were sleeping on 12” of Goose down comforters! (Saying it’s like sleeping on a soft billowy cloud would be inaccurate- you’d fall through a soft billowy cloud & hit the ground like a brick. THAT doesn’t sound comfortable in the least!! 😂😂) So, if you like sleeping on a soft bed, the 4” is perfect!! So why is Lucid’s customer service so amazing? Well, just like every single other product in the world, occasionally one of those products will be defective or something just not right with it. It happens. No matter how great & amazing a company is, it’s pure naivety to believe that they will never ever have some sort of problem with one of the hundreds of thousands of individual products they sell. I don’t mean that every single one of a product they sell will have a problem, I am saying that 1 of the hundred thousands of one specific item will come off the factory floor as defective. In the situation I am referring to, that one item out of hundreds of thousands, happened to be the most recent of 3 of the 4” toppers I have purchased from Lucid. Building a great reputation for selling great products in various shapes and sizes is one thing. How your customer service department handles a situation when a customer contacts them saying that they are having problems with one of their products because that item is defective - THAT is how a company KEEPS their well earned great reputation. In full disclosure, I did have to contact them twice, but I honestly think that the first time I either put in the wrong reply email or the message portal on their website was not working properly- which honestly, with 99% of message portals and there being people writing about various things- compliments, curiosity and complaints as well as on occasion (yes it happens) competitors spamming message portals in an attempt to bog down customer service in order to make the department look ineffective, I personally think it’s better to just use the company’s customer service/information email, making sure that you write a brief description of your reason for contacting them IN ALL CAPS SO THAT THEY SEE IT PLAIN AS DAY! (Just a little advice from someone who has purchased far too many products online lol I am getting better at not doing that 😂😂 Anyways, customer service was amazing and went above and beyond. I emailed them explaining the problem, they wrote back requesting a couple pictures so they could see what I was explaining and to pass on those pictures to product quality control and then a reply stating that they had shipped me a replacement at zero cost to me. All within 3 days! Honestly, if I had sent pictures with my first email , it most likely would’ve been taken care of in one day, so the extra two days are on me! Thank you Lucid!! You have gained a loyal customer 😊
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Reviewed in the United States on August 11, 2025 by Burtice Wood