Lil John,
the triple zero site is quite funny! Very French... They have listed their products by typical usage & altitude rather than giving them temperature ratings. The FAQ has something like this:
Pour quelle utilisation et température conseillez vous le BARBAT 1100 ?
Le BARBAT 1100 est le sac expé extrême, plus ce n'est pas utile.
C'est le sac pour les températures extrêmes.
Which roughly translates to :
What is the recommended temperature for use of the Barbat 1100?
The Barbat 1100 is the bag for extreme expeditions... saying anything more than that is a waste of time! It's the bag for extreme temperatures.
On the one hand, it makes some sense as no temperature guide is really very relevant... but on the other hand it makes it hard to compare with other brands. This suits French manufacturers very well - it seems Triple Zero is a bit like a Grand Cru Appelation for a wine... the categorisation was made 130 years ago but the price of the wine is determined from this reputation!
To help you choose, this page shows typical usage for products:
http://www.triplezero.fr/util.php?u=1
If you want a translation, let me know.
John