A different question altogether. I use down exclusively for winter camping and have several down comforters for the house. In dry environments they can't be beat.

But for solo bicycle touring I'd usually not bring a sleeping bag at all. A fleece top and leggings is part of the pack as is a top shell for driving in wet weather and with a wool poncho as a mat - I'm pretty good. In fact the normal problem in Canada during the summer is .... things are TOO HOT to do anything except sleep with only your underwear.

When travelling with the GF, I have brought a down comforter on ocassion, but only when travelling off season in September / October and one objective was to camp out near the beach during a storm. Otherwise, during the summer, the usual problem in a small tent is too much body heat and sleeping bags become something you sleep on - not in.

So what kind of temperatures are you guys (n gals) experiencing that you need a sleeping bag and whats the rating on the bag?