You'll be surprised at how super easy it is for any man to pull together this casual look. Just a black crew-neck t-shirt married with navy jeans. Want to tone it down with footwear? Introduce a pair of charcoal canvas work boots to the equation for the day. So as you can see, this combo is a really great option, especially for weird transition weather, when the temperature is getting lower. Perfect if you're scouting for some seriously inspiring relaxed casual style for 20-somethings.