Layering Sleeping bags.

Just sharing my experience with a layered sleeping system. On my recent trip to Kahurangi, I decided to experiment with my sleeping system. As I come from a warm climate, my main sleeping bag is a 50F/10C sleeping quilt. I have a heavy Mont Nadgee sleeping bag that I usually take to NZ, not entirely sure of the temp rating, but I have never zipped it up as I always get too hot regardless of whether I am in a hut or tent. On a previous summer trip, I took my 10C quilt and slept in my warm clothes. It was ok for most nights, but other nights I had on all my clothing and still froze (nights got cold enough for a fresh dusting of snow not much higher than we camped). This year I took a different approach. I bought myself a 40F/4.5C quilt. The thinking was - that it would make a great winter bag for QLD camping, - I could layer it with my existing 10C quilt when required for cold NZ nights (manufacturer suggested the combined system would give me 20F/-6.5C) - Cost wise, it worked out much cheaper than buying a single bag that would do the job. - it would give me a lot of flexibility on the trail to adjust to the different conditions I was expecting (tent, remote hut, full hut, unusually cold nights) I just wanted to report that it worked out really well. Some nights I used my 10C, some nights I used the 4C and some night I used both. Often if I used both, I would start with just one and add the other during the night if required, a quick 30 second process. Never was I cold or too hot. Total weight for both quilts was 800g including straps to keep them together, way less than my Mont Nadgee (1365g). I suspect that this will be my approach for all future summer tramps. Cheers, Moh.