The Outdoor Research Men's Cathode Insulated Vest delivers a shot of lightweight, low profile warmth to keep your core warm in cold, damp conditions. Toss it over a flannel on blustery afternoons around town, slip it on when you're on belay, or wear it under a shell when you hit the skintrack before the sun comes up. PrimaLoft Gold insulation delivers surprising warmth given how light and compressible it is, and the Pertex Quantum fabric staves off light precipitation and heat robbing wind. Schoeller stretch side panels let you move freely so you can ski, climb, or hike in comfort. The trim fit maximizes insulating efficiency and ensures the Cathode fits under your technical jacket, and the whole vest stuffs into its own pocket for easy storage once your blood starts pumping and you need to cool off.