I use one as an underquilt. All you have to do is fold in half, tie the strings, run some shock cord through the grosgrain on one side, through the fold one the other, tie the two pieces together, hook it to the hammock, and presto! Cheap and easy uq good to the low 60's without any other weather protection. They are extremely common for summer use in hammocking. I even have a top quilt from one...I love em for my climate.
Welcome to above-ground dwelling.
Ps, if my instructions aren't clear enough dejoha(one of the forum members and author of "the ultimate hang") has a pictorial thread about how to make both the sewn and no sew versions. Good luck!
"We do not go to the green woods and crystal waters to rough it, we go to smooth it."- G. W. Sears
My forum name is Fish<><; I'm in the navy; and I hate sleeping on the ground. If I didn't need ground to walk on or measure resistance to, I think I could happily give it up.