Yeah, the cotton is nicely textured and much appreciated... padding is frequently neglected altogether. The restraint points are a tad off-center. And a bit more detail would be nice: wood grain, perhaps, or spots of tarnish on the metal. Kudos, though, for keeping it simple!
Padding is simply using the spray can feature in paint. Keeping this thing simple is gonna be the only way it'll look like anything. To draw like BAC would be obviously better, but he was an artist unlike myself : P
Piece by piece... this picture is beginning to resemble a Colorform. Nice shading on the knees, though. The increased detail on the latch works pretty well too.