Trail and River Rovers of East Carolina (TRREC) Message Board › Questions, Info., & Tips › Standardized Sleeping Bag Ratings (EN)
|A former member||
The EN (European Norm) system for rating sleeping bag warmth is starting to be more commonly used in the US. The EN is a testing protocol which "produces a range of temperatures designed to communicate how the bag sleeps in different conditions, for different genders."
For example, stores such as REI are now reporting available EN ratings on their website. Here's a link to the EN rating for a Mountain Hardwear Phantom 15 (click on the "specs" tab). It shows that lowest rating at which the "standard" man will be comfortable in this bag is indeed 15 degrees, but the lowest range for the standard woman is 26 degrees.
These ratings mean that soon it will no longer be "let the buyer beware" when trying to compare sleeping bags. Previously, the advice given by the experienced was to assume that a manufacturer's estimate of a sleeping bag's warmth was optimistic by at least 10 degrees. However, if a manufacturer reports the EN rating, you can be fairly sure of the bag's warmth rating, and you can compare it to a bag from another manufacturer, provided they also report the EN rating.
What about sleeping bags that don't provide EN ratings? You may be getting a great deal, but it's probably best to assume the bag's ratings are optimistic by at least 10 degrees.
Edited by User 4,317,474 on May 5, 2010 9:26 PM