Sierra Designs Zissou 12-Degree 700 Fill DriDown Sleeping Bag
Designed to excel in a variety of overnight situations, the award-winning Zissou 15 will keep you warm and cozy wherever you camp. Stuffed with 600-fill DriDown™ insulation, the Zissou 15 stays drier longer, lofts higher, and dries faster in the presence of humidity, rain, or sweat.  Stuff sack and storage sack included. What is DriDown?  Simply put, DriDown represents the evolution of down insulation.  Regular down is treated with a molecular level polymer to create a hydrophobic finish on each individual down plume.  This finish allows DriDown to stay dry 7-times longer, retain 34% more loft when exposed to moisture and humidity, and dry 33% faster than untreated down, keeping you warmer in any environment. What is EN Testing?  Going forward, Sierra Designs will now utilize the temperature that an average man or woman will sleep comfortably at which is found via EN Testing.  At the most basic level, the EN Test helps us understand how much insulation is required to keep a person warm and comfortable through the night.  Through EN Testing, Sierra Designs will offer authentic construction and efficient functionality to assure an overall comfortable sleep experience.  For the Zissou 18, the average man will be comfortable in this bag down to 18 degrees based on EN Testing.  That can vary from individual to individual; however, this gives you a solid starting point when choosing a bag.