Hi, Double-tap leather. I am new to the forum so forgive me for resurrecting an old thread, but I wanted to say that I really like this CC bag. I have a similar leather pocket that I like very much, but I find that after I put my wallet and phone in there, I don't have room for much else (it is not specifically designed for carrying). The second pic in your second post looks a little snug. I think I would like a bit more room in the envelope portion and the shoulders straps a little thicker. I adore the style of this bag and have bookmarked your website.