Know why the Shak Classic is a big deal? It works. It works through wildly different conditions, seasons, activity and settings. It works with a perfect weight at 390g/m2, so you can roll with it alone in Fall and Spring or layer with it in the thick of winter. It works with a durable 21 micron fabric that stays looking good, doesn’t pill, pick up odor or shy away from a night on the town. It works so your choice of a perfect wool layer to take with you becomes effortless.