Marrying a grey v-neck t-shirt with blue jeans is an on-point choice for an off-duty ensemble. Add white and navy canvas low top sneakers to this outfit and you're all set looking dashing. So if it's a summertime afternoon and you want to look on-trend without putting too much effort, this ensemble will do the job in seconds time. This pairing illustrates how to wow in casual dressing as a 20-year-old.