This pairing of a v-neck t-shirt and white jeans is hard proof that a pared down casual getup doesn't have to be boring. Black casual boots can instantly smarten up any outfit. So if it's an extremely hot summertime afternoon and you want to look sharp without putting in too much work, this look will do the job in next to no time. If you're not sure how to dress as a 20-year-old, this getup is a practical illustration.