The Recovery Series
https://www.mammut.com/cat/3050/sleep...
Extreme temperatures. Extremely good sleep. With the revolutionary Protect Down Bag -21C sleeping bag you can sleep as soundly as in your own bed. As part of the Recovery series, the sleeping bag features an optimized fit for greater comfort, a central zipper for climate regulation and special material to prevent irritating noises. The down filling optimizes both weight and packing volume. Women's Protect Down Bag -21C for extreme performance.