Consider teaming a white and green crew-neck t-shirt with charcoal jeans to get a casual street style and stylish ensemble. A pair of charcoal canvas low top sneakers is the glue that ties your outfit together. So if it's a warm summertime afternoon and you want to look dapper without exerting much effort, this outfit will do the job in next to no time. This getup illustrates that as a 20-something gentleman, you have a vast array of sartorial options.