For a while now we've been looking into a passive system to protect volunteers who work on roofs. Every system that we could find involved wearing harnesses and safety tethers, which we found to be too clumsy for our purpose.
We have found our solution in a a brand new product called Horizontal Undereave Guard System (HUGS) is really amazingly simple and is completely passive. We have ordered a HUGS system and will begin using it on the next house we frame.
You can see the HUGS system on their website: http://www.hugsafety.com/
