JAC-SHIRTIntroduced into our product line some fifty years ago, this icon has served more outdoorsmen in a wider range of conditions than we could begin to count. A overshirt, insulating layer or light jacketit performs without fail, no matter what role it serves. One long time Filson employee recalls his father packing his favorite Jac Shirt on each and every hiking, camping and canoeing trip taken with his Boy Scout troop throughout the 1980s. Dad still