Sierra Designs Pyro 15 Degree Sleeping Bag Regular

Killer Deal-2011 Backpacker Gear Guide

The Sierra Designs Pyro 15 Degree is a lightweight, compact 15 degree bag that is remarkably affordable. The Pyro 15 features an ergonomic footbox, snag-free zipper tracks, draw cord at collar, draft collar, sculpted hood, pad locks and much more.

The Pyro 15 incorporates CCT or Core Comfort Technology. This technology strategically prioritizes the insulating materials according to Sierra Design's Body Mapping process ( similar to the process used for apparel design). In addition, double baffle construction maximizes loft and thermal performance. The Pyro 15 includes a storage sack, stuff sack and a limited lifetime warranty.

EN 13537 Tested (European Norm)
EN Comfort Limit: 25 degrees F / -4 degrees C
EN Lower Limit: 12 degrees  F / -11 degrees C
EN Extreme Limit: -22 degrees  F / -30 degrees C

European DIN EN 13537 temperature ratings:

Comfort rating-
This temperature is the lowest limit of the comfort range, in which a sleeper in a relaxed position with the zipper closed maintains thermal balance and doesn't get cold. Based on a 1.6 m standard woman with a weight of 60 kg.

Limit rating-
This is the lowest temperature in which a sleeper in a rolled-up position maintains thermal balance and doesn't get cold. Based on a 1.73 m standard man with a weight of 70 kg.

Extreme rating-
At this temperature the sleeping bag offers protection from freezing, however there is a risk of hypothermia. It is assumed that a standard woman in a tightly rolled up position can withstand that level of cold for six hours.