Climate 3 JacketWith a spec list that puts most comparable mid layer jackets to shame, you could say our Climate 3 mid layer jacket is pretty much climate control with sleeves. Its low weight and high tech all the way thanks to Polartec Alpha active and breathable insulation. Made to keep the U. S. Special Forces warm with sustained comfort without shedding layers, this innovative insulating material is made specifically to provide temperature regulation in active