This casual combo of a tan long sleeve shirt and a white crew-neck t-shirt is super easy to pull together in next to no time, helping you look sharp and ready for anything without spending a ton of time rummaging through your wardrobe. Black leather sandals are the simplest way to give a sense of stylish nonchalance to your ensemble. Now that's a look that's bound to make you stand out among other 20-year-old fellas.