Dave,
The stuff I've got feels coarse and stiff, around an inch mesh.
It's hard so kooks don't catch in it. Net a fish with a flying hook, or have one spin up in the net and it doesn't catch and tangle.
For some reason, it doesn't de-slime the fish. If they made it in a smaller, lighter mesh I reckon it would catch on with bait anglers.
The nets, on the other hand, are much too heavy to lug around or use single-handed from a boat.