Works perfectly but I have a concern
The Gewa Air case protects the cello well, but was very uncomfortable for my daughter to carry (shoulder and neck aches). So we purchased the backpack attachment. The attachment lifts the cello up higher, and away from the body (so the scroll no longer knocks against the back of her head). She can now carry the cello all day from class to class. However: the fastenings are velcro only; I can’t believe that will last well. And it is such an expensive piece; should have been made to last. Remind me to send an update, on durability over time.