Hi! I don't own a Balenciaga City Cross with the perforations, but I saw one in person in blue and plomb at Neiman Marcus a few weeks ago and the bag is all leather. You're definitely right that it gives the illusion of looking like mesh, though. You can visit Barney's to see the Work bag and then Balenciaga also has the bag on their site. I really like the bag, but read that a lot of fans think otherwise.