One benefit of our newly-made seam: we get to see just what kind of fiber magic went into this sleeve.

No magic, but we can see that the mesh consists of a net-like layer on the top and bottom, with tiny wiry coils in between.

This type of construction allows sound waves to travel through the fabric, with little to no reflection, while dust is kept out.

Now that we have the mesh off, we can see that it had a drawstring all along! Does this mean that there's a non-destructive way in through the top?