HC4U, I'm afraid my cats would decimate anything down. You should have seen the lengths they went to, to get the red bird ornament with real feathers off our Christmas tree!
Kyle, probably, it's a Walmart $1 fabric, about 1.1 oz. and breathable ripstop. The bit of gray you can see over the cat's ear is my 2nd layer, 1.9 oz. breathable ripstop, also $1.