I bought these on Kickstarter several months ago and just received them today. I think they would make a great tether.
Here's the link:
http://www.ultimatehammocks.com/products/ultimate-straps-with-nano-weave?variant=22833328775
And here's some actual pics.
Here's the link:
http://www.ultimatehammocks.com/products/ultimate-straps-with-nano-weave?variant=22833328775
And here's some actual pics.