SLEEPING BAG TEMPERATURE
Most BlackWolf sleeping bags have been tested to the ISO 23537-1:2016 standard.
What is ISO 23537-1:2016?
ISO 23537-1:2016 is an international standard for testing the warmth of sleeping bags. This new international standard replaces EN 13537 which was introduced in the European market in the early 2000’s and was a compulsory requirement for sleeping bags sold in Europe after 1 January 2005.