For less than a pound, the Rab Xenon X Hooded Insulated Jacket features 60g PrimaLoft One insulation and a helmet compatible hood to give you a extra warmth on your next day in the alpine. Elastic cuffs help you seal this jacket around your gloves to keep out snow, and a waist drawcord does the same thing lower down. Rab designed the YKK front zipper to go up to your nose, so you can really seal out the weather when things get nasty. Plus, this whole insulated jacket stuffs into it's own chest pocket for easy storage when the clouds clear and the wind dies down a bit. The Xenon X Hooded Jacket is there when you need it, and you won't notice the weight when it's just chillin' in your pack.