Investing in an amazing jean jacket is a brilliant idea for many reasons. First, these relaxed toppers make genius layering pieces in cold weather and also can be worn over your shoulders come summer. Second, if your office doesn’t allow jeans, you may still be able to get away with a cheeky denim jacket. The list goes on and on and we will wax poetic on this topic any day of the week, but really when it comes down to brass tacks, the real reason we love a good jean jacket is because it makes every outfit instantly cooler—100% of the time. Here, 20 ways to add an It-girl vibe to your entire wardrobe—at any budget.