Green Label 3 Pack Replacement Exhaust HEPA Filter EF-2 for Kenmore and Panasonic Vacuum Cleaners (Compares to 86880 and MC-V194H)

Q: Do these contain fiberglass or are they made of polypropylene?

There made of paper not fiberglass or polypropylene . What different does it make the job is to contain the dust from leaving the vacuum cleaner and not 100% . It’s cheap enough that it’s it s Es in a three pack .

Q: Does it fit Panasonic MC-UG471 Bag Upright Vacuum Cleaner-HEPA Media Filter #86880MC -V194H?

I am not familiar with this application. I recommend that you check your Panasonic original equipment bag number, then search for an after market replacement.