It's a shirt. It's a jacket. The Mountain Hardwear Trekkin Fleece Lined Shacket Shirt for Men is whatever you want it to be. You get the casual comfort and style of a flannel shirt combined with the toughness and durability of a jacket, all with excellent mobility and a moisture wicking finish. Two chest pockets have snap closures so you can keep essentials safe and secure, and there are also two hand warmer pockets like any good jacket has. Its time has come. The Shacket.