The width can be adjusted individually by an integrated tape. This can be moved depending on the width of the book and this is how the film - no matter how wide the manga is - pull tight. The mechanism is really not simple and is stable. The tape adheres the way to the film and is not directly on befästigt book, so this is not damaged. The strip can also pull over again and re-adjust.
From the optics, one might even say that it enhances the manga, at least this is my impression. It looks like a professional cover.
When reading, the envelope may not be noticeable and protects the manga as he should.
Pay now my entire collection protect it, recommended!