Originally Posted by nancy sv

I made it through the high Andes in the middle of winter with a summer bag - it's doable. Before we headed up I went to the fabric store and bought a couple yards of lightweight fleece fabric to use as an extra layer. I actually sewed the bottom part into a bag to go over my other bag. I also wore two wool hats - yes two. I found it made a world of difference. Make sure you have a good pad - it doesn't have to be an expensive thermarest - just something to protect you from the ground. You will be VERY cold if you are touching the ground.