A grey plaid flannel long sleeve shirt and a white crew-neck t-shirt are a great combination worth integrating into your day-to-day off-duty fashion mix. Serve a little mix-and-match magic with grey suede chelsea boots. As the weather improves, it's time to shed those bulky winter layers and choose something lighter, like this look here. Great for a man in his 20s if you want to project a relaxed spirit.