I don't know, makes sense to me to
Back to the Probags...
My friend has had a set for a few months now. We used them straight up against a set of BubbleBags and found them to be on par as far as amount of Hash produced and the quality. We've done this twice now; same amount of trim from the same garden of the same strain etc.
We're on the fence about the screen up the sides. My friend isn't sure if it's a benefit as he seems to think that some hash will stick to the side screen.
Over all they seem like quality bags, good material and nice stitching.