Sleeping Bag Performance Guide

Important considerations when choosing a bag

The stated range is an indication of the potential comfort range and minimum temperature that may be possible. This should be used only as a guide in conjunction with the sleeping bag season rating. Ratings can vary dramatically dependent on whether the user is a warm or cold sleeper.

Other factors that will determine a sleeping bag’s performance are metabolism, age, thermals, socks, headwear, an individual’s health, fatigue, what you have eaten and what type of sleeping mat used. Hydronaute XT shell will increase the warmth of a sleeping bag.

EN 13537
The T Extreme temperature shown on EN 13537 rated bags is a survival rating only. Do not rely on this rating for general use!