We I’m nearly ready to start making my first homemade underquilt(UQ). The UQ will be for my Hennessy Hammock so it will be an asymmetric one with a velcro gap in it to meet up with the bottom entry on the Hennessy.
I bought 2 meters of Primaloft One 200g http://www.extremtextil.de/ and 2 meters of olive green NySil and 2 meters of apple green Nysil from http://www.fabrics-n-stuff.co.uk/. This will form the main parts of my UQ. I going for a full length one and it will be rated to -1 C
This should be fine for most of my camps and if I want to go colder I will make another UQ rated to a lower temperature
I still have to source some shockcord, line locks and grosgrain. The plans I am going to follow are from the Hammock Forums.