Why not double up your under quilts in colder weather?

[MT]

my warmer weather UQ is a 30* and my cooler weather UQ is a 0* and in the winter I'll stack them sometimes.... in the winter here weight is not as much a factor as I pull gear in a sled. This method works well.

Stacking works for me, modular systems make sense in winter when conditions can fluctuate wildly.

Heavier, a bit more fiddly but a much more flexible way of doing things.

+1 for both of these. Used the stacking method during the Frozen Butt Hangs and stayed toasty warm. Also works for top quilts.

[Dutch]

I like to mix a 3/4 and a full length for winter.

[pizza]

I like to mix a 3/4 and a full length for winter.

I have combined my 3-season Yeti and JRB Hudson River in winter and it worked great.

[Mountnman]

I have stacked UQ's and works great as long as you do as suggested before and be sure not to decompress the one between hammock and bottom UQ.