What do you hammock users have underneath you? I've heard some people use a windshield sunshade? Anyone use an underquilt? Seems like an underquilt would be best for cold weather camping, but would add bulk and wieght.

I got my hammock last year and used my Big Agnes Air Core on three trips and it worked fine. Bringing a sleeping pad has the advantage of being usable if I ever need to sleep on the ground. A windshield sunshade would save a little weight and space. I am interested of hearing from your own experiences.

Thanks.