Can the foam be cut down to a smaller size? (Without the outer cover on, of course)

Yes. If you use a utility knife with a blade for the sharp edge, it is very easy to cut the foam.

Will the Twin xl fit on top of my couch bed size 49x75?

The only way to find that out is to measure the couch and the mattress topper it sounds like you would need a full size topper

Is the cover waterproof?

I wouldn't think so since it is washable..

I have an overly plush mattress. Will this work?Or is it made to top hard mattresses?

I would say it should. I used it on a soft mattress and it was very comfortable.

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SINWEEK 3" Gel Memory Foam Mattress Topper Full Size Breathable High Density Pad for Back Pain Bed Topper with Removable Soft Cover CertiPUR-US Certified

SINWEEK 3" Gel Memory Foam Mattress Topper Full Size Breathable High Density Pad for Back Pain Bed Topper with Removable Soft Cover CertiPUR-US Certified

4.3/5

Product ID: 764695693

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Details

Brand
SINWEEK
Color
white
Size
フル
Fabric Type
Polyester
Special Feature
Durable

✅CertiPUR-US & OEKO-TEX certified materials

🌬️Breathable, non-slip soft cover

🛏️3" Gel Memory Foam for pressure relief

Description

🛌 Sleep smarter, not harder—luxury comfort that fits your lifestyle.

STAY PUT DESIGN - Elastic straps and a non-slip bottom keep your topper securely in place all night, so you wake up refreshed, not readjusting.
CERTIFIED PEACE OF MIND - Made with CertiPUR-US certified foam and OEKO-TEX certified cover, guaranteeing safe, durable, and eco-friendly sleep support.
CONTOUR HUGGING COMFORT - 3-inch gel memory foam adapts perfectly to your body curves, easing back pain and pressure points for restorative sleep.
CLEAN FRESH EVERY TIME - Removable, machine-washable soft cover with premium metal zipper ensures easy maintenance and lasting freshness.
UPGRADE WITHOUT THE EXPENSE - Transform saggy or firm mattresses into cloud-like comfort without breaking the bank—extend your mattress life effortlessly.

The SINWEEK 3" Gel Memory Foam Mattress Topper offers a breathable, high-density gel foam layer that contours to your body, alleviating pressure and back pain. Designed with a removable, machine-washable cover featuring non-slip backing and elastic straps, it ensures a secure fit on full-size mattresses. Certified by CertiPUR-US and OEKO-TEX, this topper combines safety, durability, and comfort to upgrade your sleep experience without the cost of a new mattress.

Specifications

Manufacturer	SINWEEK
Model Number	MT03
Package Dimensions	54.6 x 25.4 x 25.4 cm
Material	Gel Memory Foam
Color	white
Size	フル
Special Features	Durable, Premium, Removable
Package Weight	7.26 Kilograms
Batteries Required	No
Batteries Included	No
Material Care Instructions	Machine Wash
Brand Name	SINWEEK

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Fantastic and great service. Shipping was faster than expected.

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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