Men’s Style & Look 2017 / 2018 :
Grey button up shirt. Wear it casually with a t shirt with it unbuttoned like how this stylish guy, Adam Gallagher, has it styled. You can also button it up to look a little bit less casual. But a button up is casual, this isn't a dress shirt, so don't wear it with a suit (a sport coat, you may be able to). Pair it with jeans and chinos for a good casual, yet put together looks.