What is this actually made of? Amazon heading says "microfiber" and below it says "vinyl"; box it comes in says "cotton". Can't be all 3.

It's definitely not vinyl. It almost feels and looks like felt.

Are there 2 rolls with 30 inches each or 2 rolls with a total of 30 inches in length?

Hello, this product is a set of two rolls, the size of each roll is 4in*30in. Subsequent packaging upgrades, the product size will remain unchanged, you will receive long box packaging, with a more beautiful appearance.

Manufacturer	Azobur
Brand	Azobur
Item Weight	2.89 ounces
Product Dimensions	30 x 4 x 0.1 inches
Color	Dark Brown
Shape	Rectangular
Size	4 "x 30" / 2 rolls
Manufacturer Part Number	0/000004

Azobur Rectangular Velvet Repair Patch, Self-Adhesive Flannel Fabric Patch, Multi Colors, Microfiber Patch，Can be Used to Patch Sofas, Car Seats, Handbags, Jacket Holes and Tears (Dark Brown)

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