We wanted a lightweight piece for variable conditions when a puffy is too warm or too bulky. So we took what we learned from the Ambient Jacket and applied it here. Built using PrimaLoft® Evolve active insulation for warmth and breathability and paired with a DWR finish, this is your new cool weather staple. The Canyon Shirt Jacket is designed to keep you warm walking between pubs on a chilly Saturday night and cool when the universe gives you the middle seat on the plane.