In practise the poncho was too short. It covered my feet and up to my chest but no further. If I could put it over the ridgeline on the diagonal it'd be long enough but then I would have no way of fastening the edges shut to stop a draft. Maybe I could add velcro to the edges?
After reading that link what I'm planning on trying to make my own version up. This is how I've broken it down in my head:
- If I take a rectangular piece of nylon, drape it equally over the hammock ridgeline so that both sides drop down just below the hammock, in effect like this |____|
- For the foot end cut the corner off (triangle piece) so it follows the shape of the hammock better, so it looks like this \___|
- Stitch the foot end and the bottom length shut, leaving a small hole to allow the suspension to go through at the foot end
- At the uncut (head) end fold over the tip to stitch a channel and then thread some bungie cord through with a cord lock on either end so I can pull it tight over the head end once I'm in.
I wa going to make it out of nylon so it wouldn't be waterproof, more just to stop the windchill and help keep the ambient temperature within higher, but I gues you could make the top section (leaving the bottom bit breathable to stop moisture building up) waterproof and use it without a tarp.
The other version I saw (can't find the link) differed in that it used one side as a giant flap. So the main section went from the ridgeline around the hammock tight, kinda like \___/ , but the other side was just squared of |___| and acted like a big flap you lifted up over the ridgeline to get in and dropped back down once inside. That design required a lot more sewing to get the shape to mimic the hammock which is why I gave it a miss - never used a sewing machine in my puff.