---
product_id: 37490185
title: "4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King"
brand: "lucid"
price: "¥215838"
currency: JPY
in_stock: true
reviews_count: 7
category: "Lucid"
url: https://www.desertcart.jp/products/37490185-4-inch-gel-memory-foam-mattress-topper-ventilated-design-ultra
store_origin: JP
region: Japan
---

# cooling gel infusion for heat dissipation ventilated design for enhanced airflow 4-inch ultra plush gel memory foam 4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King

**Brand:** lucid
**Price:** ¥215838
**Availability:** ✅ In Stock

## Summary

> 🛌 Elevate your sleep game—because your bed deserves a glow-up!

## Quick Answers

- **What is this?** 4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King by lucid
- **How much does it cost?** ¥215838 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/37490185-4-inch-gel-memory-foam-mattress-topper-ventilated-design-ultra)

## Best For

- lucid enthusiasts

## Why This Product

- Trusted lucid brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stay Cool All Night:** Advanced cooling gel infusion and ventilated design prevent overheating and night sweats.
- • **Sink into Supreme Comfort:** 4 inches of plush gel-infused memory foam cradles your body for cloud-like softness.
- • **Effortless Setup & Authenticity:** Ships compressed in a box, expands within minutes—guaranteed genuine LUCID quality.
- • **Luxury Upgrade for Any Mattress:** Transforms your existing bed into a premium sleep experience rivaling top hotel suites.
- • **Pressure Point Relief, Elevated:** Ergonomically contours to your curves, evenly distributing weight to reduce aches.

## Overview

The LUCID 4 Inch Gel Memory Foam Mattress Topper combines ultra-plush 4-inch gel-infused memory foam with a ventilated design to deliver superior comfort and breathability. Engineered to evenly distribute weight and relieve pressure points, it cools effectively to prevent overheating. This king-size topper ships compressed for easy setup and comes with a 3-year warranty, making it a premium upgrade that transforms any mattress into a luxurious sleep haven.

## Description

Mattress Topper.

Review: SUPER PLUSH FEEL! - 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.
Review: The review to trust - this is the best memory foam topper on the market. - 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 desertcart, 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.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N1NV1HZ |
| Age Range (Description) | Adult |
| Assembly required | No |
| Batteries required | No |
| Best Sellers Rank | #4,951 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #15 in Mattresses Toppers |
| Brand | LUCID |
| Closure Type | Pull On |
| Color | Blue |
| Customer Reviews | 4.3 4.3 out of 5 stars (68,413) |
| Fabric Type | Memory Foam |
| Global Trade Identification Number | 00848971052044 |
| Included Components | Mattress Topper |
| Is Discontinued By Manufacturer | No |
| Item Firmness Description | Extra Plush |
| Item Weight | 27 pounds |
| Item model number | LU40KK30GT |
| Manufacturer | LUCID |
| Material | Memory Foam |
| Model Name | LUCID 4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King |
| Number of Items | 1 |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 79 x 75 x 4 inches |
| Refill | foam, gel, memory foam |
| Size | King |
| Special Feature | Gel Memory Foam |
| Specifications | certified frustration-free |
| UPC | 848971052044 |
| Warranty Description | 3-year warranty against manufacturer's defects. |
| Water Resistance Level | Not Water Resistant |
| Water resistant | not_water_resistant |

## Product Details

- **Brand:** LUCID
- **Color:** Blue
- **Fabric Type:** Memory Foam
- **Size:** King
- **Special Feature:** Gel Memory Foam

## Images

![4 Inch Gel Memory Foam Mattress Topper-Ventilated Design-Ultra Plush-King - Image 1](https://m.media-amazon.com/images/I/81DG2BM9IjL.jpg)

## Available Options

This product comes in different **Pattern, Size, Style** options.

## Questions & Answers

**Q: Why should I get a topper?**
A: Whenever your mattress is ready for a refresh, but your wallet isn’t, it’s time for a topper. Or if you wish your mattress is softer, or if you are in a dorm or renting—a topper is a great solution! Upgrade your bed without the hassle.

**Q: Will my topper come in a box?**
A: Yes! We make it easy. Lucid memory foam toppers come compressed and rolled in a box, are easy to move, and set up in seconds. Just unbox it and let it decompress for 24 to 72 hours before sleeping on it.

**Q: What are the benefits of gel infusions?**
A: Gel infusions in memory foam help regulate temperature, so it sleeps cooler than traditional memory foam.

**Q: What height topper should I get?**
A: The 2-inch profile adds a soft layer of support to your mattress. The 3-inch profile is very plush and adds even more comfort. The 4-inch profile is almost like a mini mattress, with an extra deep, plush, sink-in feel.

## Customer Reviews

### ⭐⭐⭐⭐⭐ SUPER PLUSH FEEL!
*by D***0 on September 18, 2025*

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.

### ⭐⭐⭐⭐⭐ The review to trust - this is the best memory foam topper on the market.
*by A***R on January 26, 2022*

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.

### ⭐⭐⭐⭐⭐ Review
*by D***M on August 30, 2025*

I was searching for an alternative to Tempur and Visco Soft, and I finally found it. :) The 7.5 cm thickness is perfect, especially on top of a firmer mattress. Comfortable, supportive, and exactly what I needed.

## Frequently Bought Together

- LUCID 4 Inch Gel Memory Foam Mattress Topper, Ventilated Design, Ultra Plush, CertiPUR-US Certified, King, Blue
- Lucid 4 Inch Mattress Topper Cover King – Cover For Mattress Topper - Mattress Topper Cover with Zipper – Twin Mattress Cover - Cover Only
- SafeRest 100% Waterproof King Size Mattress Protector - Fitted with Stretchable Pockets - Machine Washable Cotton Mattress Cover for Bed

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/37490185-4-inch-gel-memory-foam-mattress-topper-ventilated-design-ultra](https://www.desertcart.jp/products/37490185-4-inch-gel-memory-foam-mattress-topper-ventilated-design-ultra)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-26*