What you wear during your travel days can make or break your overall ability to relax in-flight, which is exactly why hoodies and other oversized loungewear picks have become the unofficial travel uniform in recent years. However, this spring, if you’re ready to upgrade your airport outfit (without sacrificing comfort, of course), there are numerous layering alternatives that will prove to be far more versatile throughout your trip—and we found a selection of stylish picks under $50 at Amazon. Whether your style skews preppy, casual, or somewhere in between, below, you’ll find an array of cardigans , quarter-zips , and crewneck sweaters that’ll keep you warm and comfy on-the-go while remaining easy to style throughout your trip. Now’s your chance to craft your own elevated airport uniform, with prices starting as low as $20.…