The only drawback is the Butterfly wire rack. The central part of this rack is flexible and always expresses thus through the net in the back. I have a feeling that this system was designed by a sadist. Unfortunately, I became aware of this lack weeks after purchase. The company Mammut has set new standards in the idiocy with the creation of 4 Stream Butterfly system.
In short, the backpack is suitable as a gift for enemies, for his own use he is virtually unusable.
