Sub Zero (F) Setup from the ground up

[ninjahamockman]

Wind always manages to sneak itself anywhere. Maybe adding a sock like the one they sell on dutchware will help you more it would definately help block wind.

[ocnlogan]

I believe there is a rough formula that you can use to estimate combined temp ratings of sleeping bags/quilts. I came accross it here on the forum while I was lurking, and have found it useful as a way to get a ballpark estimate of temp ratings.

Its roughly this: ((First bags temp rating) - ((70-(second bags temp rating))/2))

So for the example of a 0 degree and 40 degree UQ, it would look something like this.

0 - ((70-40)/2)

Which I believe comes out to -15 degrees. Shugs gear on the -40 trip calculates to 0 - ((70-20)/2), which is -25 degrees. So that seems to line up with people saying that the formula is a bit conservative (that, and Shug might be a warm sleeper/wearing additional gear/etc.).

Anyway, just thought you may find that useful when trying to figure out which ratings of quilts/bags/etc to combine.

Good luck finding something that works for you .

[Stumblebum66]

Taking a -25 degree setup into -40 degree weather is proof that Shug is hammock forums version of Top Gears "The Stig". He is a machine. A machine with clown shoes maybe but a machine no less.

[BrRabbit]

I believe there is a rough formula that you can use to estimate combined temp ratings of sleeping bags/quilts. I came accross it here on the forum while I was lurking, and have found it useful as a way to get a ballpark estimate of temp ratings.

Its roughly this: ((First bags temp rating) - ((70-(second bags temp rating))/2))

So for the example of a 0 degree and 40 degree UQ, it would look something like this.

0 - ((70-40)/2)

Which I believe comes out to -15 degrees. Shugs gear on the -40 trip calculates to 0 - ((70-20)/2), which is -25 degrees. So that seems to line up with people saying that the formula is a bit conservative (that, and Shug might be a warm sleeper/wearing additional gear/etc.).

Anyway, just thought you may find that useful when trying to figure out which ratings of quilts/bags/etc to combine.

Good luck finding something that works for you .

Interesting formula... According to it I had +15 - (70-0)/2 => -20F which was totally warm indeed with all clothes on, with proper insulation on the bottom, etc in -20F.