I'm not sure what the fabric is, since Goodwill doesn't label their fabrics. I haven't done much in the way of fabric buying, so I can't identify it that way. So here's a vague description:

• About the thickness of facial tissues
• Some shininess
• woven threads, probably synthetic
• Slightly see through to the point where if I hold it in front of my face and look around in a well lit room I see a blurry, slightly darked, and very red room
• bright red