You'll be amazed at how super easy it is for any gent to throw together a laid-back ensemble like this. Just a grey long sleeve t-shirt married with skinny jeans. Dark brown suede desert boots will instantly lift up even the simplest outfit. There's no better way to brighten up a dreary autumn day than a knockout outfit like this one. Men who wonder how to wear cool casual style as you move through your 20s, this pairing should answer your question.