To create a casual outfit with a twist, dress in a navy and white short sleeve shirt and a long sleeve t-shirt. Does this getup feel all-too-fancy? Let tan leather sandals mix things up. So if it's a hot summertime day and you want to look dapper without exerting much effort, this look will do the job in next to no time. Dressing inspiration like this will help you stay incredibly fashionable as you navigate your 20s.