Hi there, the Andes Infinium 800 has a Rab sleep limit of -23c (-10F) and is designed for use in polar climates.

@@RabEquipment yes I have read the limit rsting but I am wondering about the comfort rating. Couldn't find on web site.

@@xxgg Hi there, the EN test that delivers Comfort & Extreme ratings is not that reliable past -15ºC, and as the Andes Infinium 800 is designed to be used in colder climates that -15ºC we do not advise the usable temperatures from the EN standard test. Instead, we use a combination of lab tests and field testing to determine the lowest usable temperature for the bag. We have created the ‘Rab Sleep Limit’ to supplement the standard EN13537 results. It is not an ’emergency’ metric in the same way as the ‘Extreme Rating’, rather what we believe the bag’s usable limit to be. The Rab sleep limit is what we believe the sensible limit of the bag to be from past experience and feedback from our athletes and is comparable to the EN Limit of Comfort rating. You can learn more about it in this video: kzfaq.info/get/bejne/o5unjJeFrd-zfZ8.html

@@RabEquipment thank you very much for explaining in detail. Now I understand how Rab is rating.