I guess a Blizzard Survival Bag has its place for cold weather injuries above 10C otherwise I just don't believe the marketing hype. The Tog rating (uncompressed material) is around 6-8 Tog, this is a summer bag rating. For hypothermia victims, where thermo regulation has become erratic, in a just above freezing environment (0-5C) then even a substantial 1.2-1.5kg High spec Down bag (10-12 Tog) might not cut it, to provide enough thermal insulation to negate the bodies continuing heat loss. Also it should be pointed out that wet clothing may have been removed requiring an even more effective cold weather bag.

http://www.blizzardsurvival.com/

The companies marketing is suspect, with many dubious claims IMHO.





For days trips I also like to take along a Thermorest Lite Seat as well to stop the backside from freezing whilst sitting in snow or on wet cold ground. Bothy bags are very useful allowing groups to sit together and prepare warm drinks and food in their own warm and cosy micro environment once the Gas stove has been lit in the centre whilst the rain, snow and wind blows about outside.