Introduction  The weather cannot decide, and neither can your wardrobe. Heavy jackets feel stifling, yet a plain shirt leaves you shivering. So what is a shacket, and why is it the fix? While jackets for men suit extreme cold, American Eagle’s layering essentials offer a smarter middle ground.  What Is a Shacket?  A shacket is exactly what it sounds like: a cross between a shirt and a jacket. It is warmer …