Originally Posted by dakotaross
I would think that zero-C is more like a summer setup for you in Finland. What about going colder? I mean, I'm sure you're conservative in your rating, but what would you recommend for going to below 20-F for example (since I don't know what that is in C)? A pad? I presume that your setup might work well with a pad.
Well I think it's fair to say that 30F setup covers 3 seasons in finland, if you take a look at these two links you can see the average low temperatures for each month. First link is on the south coast, the next on very northmost (69 degrees north) finland.
On south coast 30F comfort would cover April to Novermber and in northmost Finland May to September.
For going colder (twenties) I'd probably just wear some warm clothing and wooly socks to bed, for colder than that a closed cell pad and maybe even an additional down top quilt would come into play. Also hot water bottles are a very neat trick in subzero temps. You get warmer quickly which it makes it easier to fall asleep plus you've got liquid water to drink in the morning.
K0m4, it's definitely an idea! Few things pop into my mind that would need some consideration. Firstly there's the weight, to completely separate the quilt from the hammock you would need one long zipper, say your hammock's 2m long and 0.5m wide, total length for the zip would be 5m! ykk #5 zipper weights 19g/m so this alone would add nearly 100g (3.5oz).
Also zippers don't insulate so there might be a problem with heat leakage through the long zipper, of course you could device an insulated zip guard but at 5m long it would probably add an other 100g. Weather you could save more weight in warmer conditions with less insulation is questionable.