This got two releases. A standard version, which you can see here, and the Poster Bag version. There are a couple of exterior differences between the two. The picture on the front is extended and has no border. Also, the lyrics for This Woman's Work are not printed on the back. The tracks on both versions are exactly the same and don't differ in any way.
If you've read any of my other posts on poster bag releases, then you'll know that I'm not really a fan of them. They're easily susceptible to damage and creasing. If you take a look at the top of mine, you'll see it's suffered a minor bit of edge wear and creasing. It's very minor, but it demonstrates my point. They don't have anywhere near the same stability as a normal sleeve release. Also, I don't know what kind of paper they use on some of these releases, but the back of this one is especially prone to fingerprint marks, which are near impossible to remove. The record comes in a separate plain black sleeve, which is also very susceptible to fingerprint marks, and that just slides into the folded poster.
I've unfolded the poster slightly for a quick peek at it. It's nothing more than the front artwork and the lyrics to This Woman's Work.