The Xero weighs only 285 grams and combines 700 fill down with featherlight Helium 20 fabric. Helium 20 is exceptionally light but also compressible and tough.
The down has a PFC-free water resistant treatment applied to it. So it won’t lose it’s warmth if you get the jacket wet.
Buy the jacket: https://goo.gl/V5e7ot
