Billym

Sorry but must disagree on a few things.

If you purchase a bag from a Canadian Manufactuar the bag may be rated in C.

Tents DO make a difference

0 rating per that particular manufacturers rating system probably indicates a survival rating not comfort rating.

Rating applies to a particular manufacturers rating system some may include a base layer some may not.

More clothes are not necessarily better. The type of clothes you wear at night have a much more significant impact than the amount of clothes.

Cameron Ownbey
http://backpackers.meetup.com/114/?gj=sj10