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Home / Home Furniture / San Zu Niao Sponge Mattress, Home Use Thickened High-Density Firm Pad, Rental Housing & Student Dorm Memory Foam Soft Pad/Rug

Attributes

Brand -
Category Root / Home Furniture
Origin -
Material High-Density Memory Foam
Firmness Level Medium-Firm
Thickness 3 inches (7.6 cm)
Cover Fabric Breathable Knitted Mesh
Recommended Use Student Dorms, Rental Apartments, Guest Beds
Care Instructions Spot clean only; do not machine wash foam core
Expansion Time 24 to 48 hours after unboxing
Weight Capacity Supports up to 300 lbs per sleeper
Certification CertiPUR-US Certified Foam
Warranty 1-Year Limited Manufacturer Warranty

6 reviews

A

Anonymous

Mar 23, 2026

Rating: 5/5

Exceeded expectations

I was skeptical about ordering a mattress online, but this one is fantastic. The high-density foam provides real support without being too hard.

A

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect for my dorm room!

This mattress pad transformed my uncomfortable dorm bed into a cloud. It was easy to set up and expanded quickly. Highly recommend for students.

A

Anonymous

Mar 18, 2026

Rating: 5/5

Saved my rental apartment bed

The landlord provided an old spring mattress, but this topper made it feel brand new. Excellent density and doesn't sink in the middle.

A

Anonymous

Mar 14, 2026

Rating: 3/5

Good but runs a bit warm

Comfort is great, but I find it sleeps a little hotter than my previous gel foam pad. Still, for the price, it's a solid choice.

A

Anonymous

Mar 13, 2026

Rating: 4/5

Solid purchase

Does exactly what it says. Makes a thin mattress much more livable. Shipping was fast and packaging was compact.

A

Anonymous

Mar 03, 2026

Rating: 4/5

Great value for the price

Very comfortable and firm enough to support my back. The only reason I didn't give 5 stars is the slight smell upon opening, but it aired out in a day.

5 FAQ

Q: Can I wash the cover in a washing machine?

A: Yes, the outer knitted cover is removable and machine washable on a gentle cycle. However, the foam core itself should never be washed; please spot clean only.

Q: How long does it take to fully expand after taking it out of the box?

A: While the pad will begin to expand immediately, we recommend allowing 24 to 48 hours for it to reach its full thickness and shape before use.

Q: Does this contain any harmful chemicals or strong odors?

A: Our foam is CertiPUR-US certified, meaning it is made without ozone depleters, PBDEs, TDCPP or TCEP flame retardants, mercury, lead, or formaldehyde. A mild scent may be present upon unboxing but will dissipate quickly.

Q: Is this suitable for a double bed frame?

A: Yes, we offer this mattress pad in multiple sizes including Twin, Full (Double), Queen, and King. Please select the appropriate size from the dropdown menu before purchasing.

Q: Does this come with a fitted sheet or just the foam pad?

A: This product includes only the high-density memory foam pad with a removable knitted cover. Sheets are sold separately.

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