Building on the glowing reception of Outdoor Research's Uberlayer Jacket, they ratcheted up the breathability while cutting the weight a little more to build the Ascendant CollectionG? Pertex Microlight movement-mirroring stretch fabric and Polartec Alpha insulation create the perfect combination for skinning uphill, belaying, or layering under a ski jacket on cold days at the resort. Meet your new favorite layer for fall, winter and spring.