





LOUNJ®
Gel Mattress Topper 2.0
Our best-selling gel memory foam topper now includes a washable cover and stay-put straps. Instantly refresh your mattress with plush, breathable comfort and cooling support.
TOPPER | W x L |
---|---|
TWIN | 38" x 75" |
TWIN XL | 38" x 80" |
FULL | 54" x 75" |
QUEEN | 60" x 80" |
KING/SPLIT | 76" x 80" |
CAL KING | 72" x 84" |







Gel Mattress Topper 2.0
Product Details
Features & benefits
- Washable Cooling Cover: Stay cool and clean with our breathable, moisture-wicking cover. Designed with advanced cooling technology, it resists heat buildup and is easy to remove and machine wash.
- Convenient Mattress Straps: Integrated elastic straps keep your topper firmly in place, so it feels like a natural extension of your mattress—no slipping or bunching. Fits 4-16" mattresses.
- LOUNJ™ Memory Foam: Our proprietary open-cell memory foam contours perfectly to your body, providing personalized comfort and adaptive support all night long.
- Advanced Gel Cooling: Infused with cooling gel beads that help regulate body temperature, promoting a cooler, deeper sleep experience.
- Minimizes Motion Transfer: Engineered to absorb movement and reduce partner disturbance—so you both sleep better, uninterrupted.
- Hypoallergenic & Antimicrobial: Crafted for sensitive sleepers. Naturally resistant to dust mites, mold, and bacteria to create a cleaner, healthier sleep environment.
- Fiberglass Free: Made without any fiberglass or hidden fire-retardant sprays, ensuring a safer sleep environment for you and your family. No itching, no irritation, just clean, worry-free comfort.
Measurements & Dimensions
Measured in inches. Width x Height.
- Twin: 38" x 75"
- Twin XL: 38" x 80"
- Full: 53" x 75"
- Full XL: 53" x 80"
- Queen: 60" x 80"
- King: 76" x 80"
- California King: 72" x 84"
Need a custom size? Click here.
Shipping Information
Box Size: 13x13x13 or 15x15x15
All toppers can be returned within 30 days from delivery. We offer a 30-day sleep trial on all mattress toppers.
All mattress toppers are compressed and shipped same or next day via FedEx Ground. Toppers arrive within 2-3 business days on average within the Contiguous US. Allow 24-48 hours for full decompression.
LOUNJ Perks
Free Shipping & Returns
30-Day Money Back
5-Year Warranty
The best just got better.
After years perfecting our memory foam, we've leveled up with Topper 2.0 — the same pressure-relieving comfort you love, now upgraded with a breathable, washable cover and built-in mattress straps to keep everything in place. Handcrafted in Phoenix, AZ for lasting quality and cool, comfortable sleep.

Cooling & machine washable cover
Designed for comfort and convenience. Our breathable, cooling cover helps regulate temperature while you sleep — and when it’s time for a refresh, just unzip and toss it in the wash. Sleep clean, sleep cool.

Body hugging gel-infused memory foam
Contours to your unique shape to relieve pressure from head to toe—so you fall asleep faster and wake up feeling refreshed.

Stays in place with straps
No more slipping or shifting. Built-in straps keep your topper securely anchored to your mattress — so you can sleep soundly without adjusting it every night. Fits mattress heights from 6 inches to 16 inches.
of customers keep their mattress topper past the 30-day return period.
of customers said they sleep cooler and wake up feeling more rested.
of our customers agree that our toppers do not have a foul odor.
FAQs
What is a mattress topper and do I need one?
A mattress topper is an additional layer of cushioning or support that sits on top of your mattress, designed to enhance its comfort or adjust its firmness. If your mattress feels too firm, a topper can add softness, or if it's aging, a topper can help improve support without needing to replace the entire mattress. Mattress toppers are typically thicker than pads or protectors, ranging from 1" to 4", and are ideal for providing that extra layer of comfort for a better night’s sleep. If you’re looking to refresh your current mattress or change its feel, a topper could be the perfect solution.
What is your return policy?
We offer a 30-day sleep trial, which means you have 30-days after receiving to return it. We think you'll love it, but in the event you have any issues, please reach out to us to start the return process.
- Free returns, no fees
- 30 days after receiving item
How do I know if I need a 2", 3", or 4"?
Choosing the right thickness for your gel memory foam mattress topper depends on your comfort preferences and needs:
2" Topper: Ideal for those who want a slight upgrade in comfort without altering the feel of their existing mattress. It provides moderate cushioning and support, perfect for enhancing a firm mattress.
3" Topper: Offers a balanced combination of softness and support. This is the most versatile option, providing more cushioning for pressure relief while still keeping you well-supported. Ideal for most sleepers.
4" Topper: Best for those who want significant pressure relief and a softer sleep experience. A thicker topper helps with deeper contouring, making it a great choice for people with joint pain or those who need extra softness.
Consider your sleeping position, mattress firmness, and personal preference to choose the right thickness for you!
Can you put a mattress topper on an old mattress?
Yes, absolutely. A key benefit of a mattress topper is its ability to refresh an old mattress. If you're not ready to purchase a new mattress, adding a topper that matches your sleep preferences can provide added comfort and extend the life of your current mattress.
How long do mattress toppers last?
Our LOUNJ memory foam mattress topper will last 5-10 years. We guarantee it for 5. Most poor quality toppers that are cheaper, imported, will only last 1-3 years.
Is your mattress cover washable?
Yes, you can unzip the mattress cover and machine-wash it on cold-warm and your favorite detergent.
What size mattresses will the straps fit?
Our straps will fit most, if not all mattresses from 6" all the way up to 16".
Is the foam safe and hypoallergenic?
Yes! Our gel infused memory foam is certified free from harmful chemicals, hypoallergenic, and odor-free, making it safe for both people and pets.
Is your foam really made in the USA?
Yes! We source the chemicals, pour, cut, and package our foam ourselves to provide you with a clean, durable, and premium product. Our factory is located in Phoenix, AZ.