What are some options for a cold-weather layer over the bug net for the hammocks? I saw a picture of a BB with a second layer over the bug net and thought that was pretty cool. Is that a home-brew mod or a regular accessory? Or am I off the page on this one and it is part of the hammock?

That extra layer seems like it would be great to eliminate drafts.

I ordered a BB 1.0 double, won't be here until later next week maybe.