I've seen mosquito netting (maybe it was Tulle?) for .28 oz/sq yard, whereas the lightest no-see-um I've seen was in the .7 oz range. Not a huge difference, sure, but hey, you don't get to a light pack load by waving off potential weight savings. I also assumed that since noseeum netting has smaller holes, there must be more material to fill in the space that would otherwise be holes.
Any other thoughts on treating the net with permethrin? Does it produce an odor in people's experience?