I had my first 6 or 7 covers made out of that same material. Looks kinda like leather and had a soft fabric inside.
The last 3 I had made out of the Double-Sided Quilted Black Nylon. These are really cool.
"This ultra premium fabric has even more padding, and features a quilted satin nylon fabric on both sides. This anti-static dust cover is double-stuffed with polyester insulation in-between, giving you the ultimate in protection for your equipment. The interior of this fabric is also very gentle on surfaces, and recommended for sensitive items!"