This listing states material: fiberglas, but in description, states no fiberglas.which is correct?

I have the same question... Its very disheartening that, after 3 months, absolutely no one can tell you what this material actually is

can i use this on mattress to protect from dust mites?

I don't think that would work, I would get a plastic cover for the mattress.

We have older round ceiling vents. Going to cut to size but are these supposed to go on outside of vent or the inside? Does it matter?

Typically you want your filters to be in line right before your furnace/blower. That way all the junk being sucked in through the return duct in your house doesn't collect inside your furnace or duct system, I'll usually use filters over the vents as a secondary if I think a location really needs it or the customer requests it. That all being said, either inside or outside the vent works the same as long as you can ensure there are no holes where air (and therefore microscopic particulates) can infiltrate.

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Merv 13 Filter Material for Air Filters (32 Ft²) , Stops Air Particles, Allergens, Dust, Mold and Pet Dander as Small as 0.3 Microns, Efficiency Breathable DIY Design (16 Square Feet)

Merv 13 Filter Material for Air Filters (32 Ft²) , Stops Air Particles, Allergens, Dust, Mold and Pet Dander as Small as 0.3 Microns, Efficiency Breathable DIY Design (16 Square Feet)

Product ID: 485945103

Details

Air Filter Construction
Pad/Roll
Brand
PRETTYWIT
Compatible Air Conditioners
Inventor
Compatible devices
Furnace
MERV rating
13
Manufacturer
AIRBAY

📏Generous 16 sq ft DIY-friendly size

🦠Filters particles down to 0.3 microns

🌬️Breathable, lightweight, no fiberglass

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20316 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Breathe smarter, live better — upgrade your air game with MERV 13 power!

CUSTOM FIT FREEDOM - Cut and shape the large 16 sq ft roll to perfectly fit your HVAC or furnace filter needs.
MICROSCOPIC DEFENSE - Captures 90% of particles as tiny as 0.3 microns for cleaner, healthier air.
VERSATILE PROTECTION - Ideal for homes, offices, and warehouses to reduce allergens, dust, mold, and pet dander.
CONFIDENCE IN QUALITY - Backed by responsive customer service and a satisfaction guarantee for peace of mind.
HYPOALLERGENIC SAFE - No fiberglass irritation—soft, breathable material designed for sensitive environments.

This MERV 13 filter material offers high-efficiency filtration by trapping airborne particles as small as 0.3 microns, including allergens, dust, mold, and pet dander. Sized at 16 square feet, it’s designed for easy DIY customization to fit various HVAC and furnace filters. Made without fiberglass, it ensures a hypoallergenic, breathable experience suitable for homes and workplaces. Trusted for improving air quality and backed by a customer satisfaction guarantee.

Specifications

ASIN	B08K3BDHR6
Air Filter Construction	Pad/Roll
Best Sellers Rank	3,717,941 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 2,588 in Air Purifier Filters
Brand Name	PRETTYWIT
Common Applications	Appliances, Residential
Compatible Air Conditioners	Inventor Chilly 9000BTU
Compatible Devices	Furnace
Country Of Origin	China
Customer Reviews	4.3 4.3 out of 5 stars (277)
MERV Rating	13
Manufacturer	AIRBAY
Material Type	Fibreglass
Model Number	65
Number of Items	1
Product Grade	new
UPC	193499920871
Unit Count	1.0 count

Reviews

E**N

they worked great

27.12.2025

A**R

Works well to reduce airborne particulates by filtration. I have noticed a decrease in respiratory issues after use.

1.01.2026

M**A

Great value for my needs

22.01.2026

P**.

I used this to revive an old Rigid air filter system. OEM filters are no longer available so this is a practical alternative.

10.07.2025

T**N

The product is fine. Curious why the listing shows 32 square feet in the main description but then 16 square feet listed as the colour. Why? The piece I got was 16 ft2.

13.12.2022

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The product quality is outstanding. Exactly what I needed for my work.

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