Lucid 4 Inch Gel Memory Foam Mattress Topper Twin XL
- 4 inch gel memory foam, Twin XL
- Ultra plush, soft feel
- Ventilation channels, CertiPUR-US certified
- 3 year warranty, 400 thread count cover
- Spot clean only, not water resistant
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A thick, soft gel memory foam topper with ventilation channels for a dorm or guest bed. It needs careful spot cleaning and gives no spill protection.
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ASIN: B01MYVATSJModel: LU40TX30GTCategory: Mattress Toppers
Colors Available
Styles Available
Sizes Available
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Overview
A dorm room bed or a guest room Twin XL is where this thick foam topper fits. Ventilation channels cut into the gel memory foam to allow airflow, and a pull-on cover holds it to the mattress.
The reason to buy is deep cushioning for a firm or worn mattress. The limit is care and spills, since there is no waterproofing and washing is limited to spot cleaning.
Who it's for
Sleepers who like a soft, sink-in surface on a firm Twin XL mattress get the most from it. Anyone wanting a firmer feel or protection from liquid should look elsewhere.
Pros and cons
- Thick four inch layer
- Gel memory foam
- Spot clean only
- Not water resistant
- Soft feel may be too deep
Performance notes
Memory foam contours around the body and the ventilation channels give air a path through the layer. A thicker foam sinks further, so the feel moves toward soft, and the existing mattress below is only felt at the base.
Specifications
| Brand | Lucid |
|---|---|
| Model | LU40TX30GT |
| Dimensions & fit | |
| Size | Twin XL |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Material Type | Memory Foam |
| Color | Blue Gel |
| Included components | |
| Included Components | Mattress Topper |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 3-year warranty against manufacturer's defects |
| Other details | |
| Item Firmness Description | Soft |
| Water Resistance Level | Not Water Resistant |
| Closure Type | Pull On |
| Thread count | 400 |
| Thickness | 4 inches |
| Product Care Instructions | Spot Clean Only |
| Features | Gel Memory Foam, ventilation channels |
Closest rivals on specs
Sleepyhead 2 Inch Gel Memory Foam Mattress Topper Twin XL- Thread count 400 vs 320 (+25%)
Frequently asked questions
Is the Lucid topper waterproof?
No. It is listed as not water resistant, so use a separate protector if spills are a concern.
Is the Lucid topper a full mattress?
No. It is a 4 inch topper that goes over an existing mattress.
How do I clean the Lucid topper?
Spot clean only, per the care line.