The problem-solver for cold weather, low activity and "hurry up and wait" style pursuit. The First Lite Uncompahgre 2.0 Puffy Jacket is the time-tested insulating component of the First Lite Layering Kit. Built around 37.5 by Cocona's Active Particle Technology, the Uncompahgre's liner and insulation actively transport moisture from the inside and pushes it to the outside where it evaporates before it stinks. Combine that with a body mapped insulation pattern providing warmth where it is needed and you have the ultimate insulation layer whether you're glassing at 10,000ft or chugging a Coors at sea level.