Planning your travel outfit is often just as hard as packing. If you're smart, you'll layer the most essential pieces you've got, the ones that will keep you cozy on the plane but will also come in handy on your trip. Keeping style in mind, we searched for the type of ribbed jumpsuits and jersey sweatshirts that are live-in but standout stylish. Accessorize with flat shoes that you can slip on and off, a cap to secure your hair in place, and a carry-on tote to pack the little things. In an outfit this comfortable, you'll forget how good you look and wonder why everyone's staring while you go through security.